| APOPIS | Abnormal proteins in the pathogenesis of neurodegenerative disorders | In English | → Biochemistry, biophysics → Neurology |
| APPPH | Association for Pre- & Perinatal Psychology and Health | In English | → Associations → Psychology → Pediatry |
| APRHOC | Association des pharmaciens PRaticiens des HÔpitaux du Centre | In French | → Associations → Pharmacology, toxicology |
| APS | Antiphospholipid Syndrome | In English | → Pathology |
| APSIR | Asia Pacific Society for Impotence Research | In English | → Organizations and associations → Sexual problems → Urology |
| APSTE | Annuaire pour la Promotion de la Sécurité au Travail et Environnement | In French | → Labour, labour economics |
| APTT | Activated Partial Thromboplastin Time | In English | → Blood and circulatory system |
| AQDM | Association Québécoise de la Dégénérescence Maculaire | In French | → Associations → Ophtalmology |
| AQHSST | Association Québécoise pour l'Hygiène, la Santé et la Sécurité du Travail | In French | → Associations → Labour, labour economics |
| ARB | Angiotensin Receptor Blocker | In English | → Biochemistry, biophysics → Physiology |
| ARC | Aggregation of Red Blood Cells | In English | → Blood and circulatory system |
| ARC | Association pour la Recherche sur le Cancer | In French | → Associations → Oncology |
| ARD | Association pour la Recherche sur le Diabète (www.a-rd.fr) | In French | → Associations → Physiology → Pathology |
| ARDE | Asociaţia Română a Disfuncţiei Erectile | In Romanian | → Associations → Sexual problems → Urology |
| ARFY | Atherosclerosis Risk-Factors in Female Youngsters | In English | → Blood and circulatory system → Cardiology |
| ARGE-TCM | Arbeitsgemeinschaft für Traditionelle Chinesische Medizin | In German | → Associations |
| ARMY | Atherosclerosis Risk-Factors in Male Youngsters | In English | → Blood and circulatory system → Cardiology |
| ARN | Association of Rehabilitation Nurses (www.rehabnurse.org) | In English | → Associations |
| ARTEB | Agence Rhône-Alpes pour le développement des Technologies médicales et des Biotechnologies | In French | → Biotechnology |
| ARVO | Association for Research in Vision and Ophthalmology | In English | → Associations → Ophtalmology |
| ASA | American Society of Anesthesiologists | In English | → Organizations and associations → Anesthesiology |
| ASCOFI | Asociación Colombiana de Fisioterapia | In Spanish | → Associations |
| ASESA | Asociacion Espanola de Andrologia | In Spanish | → Organizations and associations → Sexual problems → Urology |
| ASH | Alkoholische Steatohepatitis | In German | → Pathology |
| ASI | Associazione Sanitaria Internazionale | In Italian | → Associations |
| ASL | Azienda Sanitaria Locale | In Italian | |
| ASM | Assistenti di studio medico | In Italian | |
| ASMAC | Association Suisse des Médecins-Assistant(e)s et Chef(fe)s de clinique = VSAO | Verband der Schweizer Assistenz- und Oberärzte/-ärztinnen | In German |
In French | → Associations |
| ASMI | Association Suisse des Médecins Indépendents | In French | → Associations |
| ASPEX | Antiviral Spot of Excellence | In English | → Virology → Pharmacology, toxicology |
| ASPHoG | Association des Pharmaciens Hospitaliers de Guadeloupe | In French | → Associations → Pharmacology, toxicology |
| ASPS | Association Suisse de Psychologie du Sport | In English | → Associations → Psychology → Sport, physical exercises |
| ASPS | Association Suisse de Physiothérapie du Sport | In English | → Associations → Sport, physical exercises |
| ASRIM | Associazione della Svizzera Romanda e Italiana contro le Miopatie | In Italian | → Associations → Pathology |
| ASS | Autisme Spectrum Stoornissen | In Dutch | → Neurology |
| ASSIPHAR | Association Nationale des Asssistants et Anciens Assistants en Pharmacie Hospitalière | In French | → Associations → Pharmacology, toxicology |
| ASSM | Académie Suisse des Sciences Médicales = SAMS | Swiss Academy of Medical Sciences | In English = SAMW | Schweizerische Akademie der medizinischen Wissenschaften | In English |
In French | → Academies |
| ASSM | Austrian Society for Sexual Medicine | In English | → Organizations and associations → Urology → Gynaecology → Psychology |
| ASSO | Austrian Society for Surgical Oncology | In English | → Organizations and associations → Oncology → Surgery, orthopaedics, ophthalmology |
| AST | Associazione Sclerosi Tuberosa | In Italian | → Associations → Neurology |
| ASTB | Association Sclérose Tubéreuse de Bourneville | In French | → Associations → Neurology |
| ATCD | Antécédents | In French | |
| ATNC | Agent Transmissible Non Conventionnel | In French | → Biochemistry, biophysics → Infectious diseases |
| ATSS | Australasian Tuberous Sclerosis Society | In English | → Organizations and associations → Neurology |
| ATU | Autorisation Temporaire d'Utilisation | In French | → Pharmacology, toxicology |
| AUA | American Urological Association | In English | → Associations → Urology |
| AVC | Accident Vasculaire Cérébral | In French | → Cardiology → Neurology |
| AVH | Association Valentin Haüy | In French | → Associations |
| AVIP | Anthrax Vaccine Immunization Program | In English | → Immunology and allergy → Pharmacology, toxicology |
| AVIS | Associazione Volontari Italiani donatori Sangue | In Italian | → Associations → Blood and circulatory system |
| AVMA | American Veterinary Medical Association | In English | → Associations → Veterinary medicine |
| AvSeM | Aviation Space and Environmental Medicine | In English | → Serial publications, periodicals → Aeronautics, aircraft |
| AWIC | Animal Welfare Information Center | In English | → Veterinary medicine |
| AWMF | Arbeitsgemeinschaft der Wissenschaftlichen Medizinischen Fachgesellschaften | In German | → Associations |
| BAAC | Bulletin d'Analyse des Accidents Corporels (de la circulation) | In French | → Transport and postal services |
| BAVU | Ballon Autoremplisseur à Valve Unidirectionnelle | In French | |
| BBT | Basal Body Temperature | In English | → Reproductive biology |
| BCLS | Base Cardiac Life Support | In English | |
| BCP | Birth Control Pill | In English | → Pharmacology, toxicology → Gynaecology |
| BD | Baby Dance | In English | → 3926 → Reproductive biology |
| BDU | Berufsverband der Deutschen Urologen | In German | → Organizations and associations → Urology |
| BECT | Bureau d'Études Cliniques et Thérapeutiques | In French | |
| BEH | Bulletin Épidémiologique Hebdomadaire | In French | → Serial publications, periodicals |
| BEKIS | Bioethik Kommunikations- und Informationssystem | In German | → Libraries → Ethics → Biological sciences |
| BELIT | Bioethik Literaturdatenbank | In German | → Libraries → Ethics → Biological sciences |
| BESS | Biomedical Experiment Support Satellite | In English | → Biological sciences → Spaceflight engineering, astronautics |
| BESS | Biomedical Experiment Scientific Satellite | In English | → Biological sciences → Spaceflight engineering, astronautics |
| BfEL | Bundesforschungsanstalt für Ernährung und Lebensmittel (www.bfel.de) | In German | → Research institutes → Nutrition → Beverage industry → Food technology |
| BFS | Blow-Fill-Seal | In English | → Pharmacology, toxicology |
| BFY | Banque Française des Yeux (www.bfy.asso.fr) | In French | → Associations → Surgery, orthopaedics, ophthalmology → Ophtalmology |
| BG | Blessé Grave | In French | → Traumatology |
| BGKK | Burgenländische Gebietskrankenkasse | In German | → Insurance |
| BGSP | Berliner Gesellschaft für Soziale Psychiatrie | In German | → Organizations and associations → Psychiatry |
| BHM | Bulletin for the History of Medicine | In English | → Serial publications, periodicals → History |
| BioMi | Biomedical Microdevices | In English | → Serial publications, periodicals |
| BIUM | Bibliothèque interuniversitaire de Médecine | In French | → Libraries |
| BJC | British Journal of Cancer | In English | → Oncology |
| BJD | British Journal of Dermatology | In English | → Serial publications, periodicals → Dermatology |
| BJU | British Journal of Urology | In English | → Serial publications, periodicals → Urology |
| BKS | Blutkörperchensenkungsreaktion | In German | → Blood and circulatory system |
| BKS | Blutkörperchensenkung | In German | → Blood and circulatory system |
| BL | Blessé Léger | In French | → Traumatology |
| BLA | Biologics Licence Application | In English | → Pharmacology, toxicology |
| BMFT | Bundesministerium für Forschung und Technologie | In German | → Research policy → Central administration |
| BMGF | Bundesministerium für Gesundheit und Frauen | In German | → Central administration |
| BMI | Body-Mass Index | In English | |
| BMP | Biological and Medical Physics | In English | → Serial publications, periodicals → Biochemistry, biophysics |
| BMRC | Biomedical Research Council | In English | → Biological sciences |
| BMS | Bulletin des médecins suisses | In French | → Serial publications, periodicals |
| BMS | Baby Making Sex | In English | → 3926 → Reproductive biology |
| BNDF | Brain-derived neurotrophic factor | In English | → Hormones → Neurology |
| BNPS | Brevet National des Premiers Secours | In French | |
| BNS | Brevet National de Secourisme | In French | |
| BÖC | Berufsverband österreichischer Chirurgen | In German | → Organizations and associations → Surgery, orthopaedics, ophthalmology |
| BP | Blood Pressure | In English | → Blood and circulatory system |
| BPCO | Broncho-Pneumopathie Chronique Obstructive | In French | → Chest diseases |
| BPH | Benigne Prostata-Hyperplasie | In German | → Pathology |
| BPMS | Blood Pressure Measuring System | In English | → Blood and circulatory system |
| BPWG | Blood Products Working Group | In English | → Organizations and associations → Pharmacology, toxicology |
| BRCC | Biomedical Reference Collection : Comprehensive Edition | In English | → Libraries → Biological sciences → Biotechnology |
| BSCS | Budapest Semester in Cognitive Science | In English | → Higher education, universities → Psychology → Neurology |
| BSE | Bezinkingssnelheid van de erythrocyten = ESR | Erythrozytensedimentationsrate | In German = ESR | Erythrocyte Sedimentation Rate | In English = VES | Velocità di eritrosedimentazione | In Italian = ENG | Eritrocitų nusėdimo greitis | In Lithuanian |
In Dutch | → Blood and circulatory system |
| BSE | Bovine Spongiform Encephalopathy = ESB | Encéphalopathie Spongioforme Bovine | In French = BSE | Bova Spongoforma Encefalopatio | In Esperanto = EEB | Encefalopatía Espongiforme Bovina | In Portuguese = BSE | Bovine Spongiforme Enzephalopathie | In German = BSE | Bovin spongiform ensefalopati | In Turkish = ESB | Encephalopathia Spongiforme Bovin | In Interlingua = BSE | Boviene spongiforme encefalopathie | In Dutch = GSE | Goveđa spongiformna encefalopatija | In Serbo-Croatian = ESB | Encefalopatia Spongiforme Bovina | In Italian |
In English | → Veterinary medicine |
| BSE | Bova Spongoforma Encefalopatio = ESB, EEB, GSE (look above) |
In Esperanto | → Veterinary medicine |
| BSE | Bovin spongiform ensefalopati = ESB, EEB, GSE (look above) |
In Turkish | → Veterinary medicine |
| BSE | Bovine Spongiforme Enzephalopathie = ESB, EEB, GSE (look above) |
In German | → Veterinary medicine |
| BSE | Boviene spongiforme encefalopathie = ESB, EEB, GSE (look above) |
In Dutch | → Veterinary medicine |
| BSG | Blutsenkungsgeschwindigkeit | In German | → Blood and circulatory system |
| BSG | Blutkörperchensenkungsgeschwindigkeit | In German | → Blood and circulatory system |
| BSR | Blutsenkungsreaktion | In German | → Blood and circulatory system |
| BSSM | British Society for Sexual Medicine | In English | → Organizations and associations → Sexual problems → Urology → Applied sciences, technology |
| BtMG | Betäubungsmittelgesetz | In German | → Law, jurisprudence → Pharmacology, toxicology |
| BUN | Blood Urea Nitrogen | In English | → Physiology |
| BvU | Berufsverband der österreichischen Urologen | In German | → Organizations and associations → Urology |
| CA | Cancer Antigen | In English | → Biochemistry, biophysics → Oncology |
| CAB | Complement Activation Blocker | In English | → Biochemistry, biophysics → Immunology and allergy |
| CAD | Computer-Aided Detection | In English | → Diagnostics → Computer-based techniques |
| CAHTA | Catalan Agency for Health Technology Assessment = AATRM | Agència d'Avaluació de Tecnologia i Recerca Mèdiques | In Catalan |
In Spanish | |
| CAMARI | Certificat d’Aptitude à Manipuler les Appareils de Radiographie Industrielle | In French | → 620039 |
| CAMR | Coalition for the Advancement of Medical Research (www.stemcellfunding.org) | In English | → Organizations and associations → Biotechnology |
| CAMR | Canada's Access to Medicines Regime = RAMC | Régime Canadien d'Accès aux Médicaments | In French |
In English | → Pharmacology, toxicology |
| CAMS | Certificat d'Aptitude en Médecine du Sport | In French | → Education → Sport, physical exercises |
| CAN | Canadian Arthritis Network (www.arthritisnetwork.ca) | In English | → Organizations and associations → Pathology |
| CAOG | Central Assoication of Obstetricians and Gynecologists | In English | → Organizations and associations → Obstetrics |
| CAPS | Catastrophic Antiphospholipid Syndrome | In English | → Physiology → Pathology |
| CARMA | Cared for the Aged at Risk of Marginalisation | In English | → Personal health and hygiene → Public health and hygiene → 3626 |
| CARMF | Caisse Autonome de Retraite des Médecins Francais | In French | → Labour, labour economics → Insurance |
| CARPIMKO | Caisse Autonome de Retraite et de Prévoyance des Infirmiers, Masseurs-Kinésithérapeutes, médecins-podologues, orthophonistes et orthoptistes | In French | → Labour, labour economics → Insurance |
| CarR | Caries Research | In English | → Serial publications, periodicals |
| CARUM | Club des Anesthésistes Réanimateurs Urgentistes Militaires | In French | → Organizations and associations → Anesthesiology |
| CAVP | Caisse d'Assurance Vieillesse des Pharmaciens | In French | → Labour, labour economics → Insurance → Pharmacology, toxicology |
| CBC | Complete Blood Count | In English | → Blood and circulatory system |
| CBR | Centre for Blood Research | In English | → Blood and circulatory system |
| CBR | Computers and Biomedical Research | In English | → Serial publications, periodicals → Computer science → Biological sciences |
| CCAIMT | Common Carotid Artery Intima Media Thickness (www.rsna.org) | In English | → Blood and circulatory system → Cardiology |
| CCIERBC | Comité Consultatif INRETS d'Éthique sur la Recherche Biomédicale et Comportementale | In French | → Organizations and associations → Ethics → Transport and postal services |
| CCLAT | Centre Canadien de Lutte contre l'Alcoolisme et les Toxicomanies (www.ccsa.ca) = CCSA | Canadian Centre on Substance Abuse | In English |
In French | |
| CCM | Centre Culturel Médical | In French | |
| CCM | Comitato Collaborazione Medica | In Italian | → Organizations and associations |
| CCMC | Centrul de Cercetări de Medicină Comparată | In Romanian | |
| CCMH | Concentration Corpusculaire Moyenne en Hémoglobine = MCHC | Mean Corpuscular Hemoglobin Concentration | In English |
In French | → Blood and circulatory system |
| CCNI | Comité Consultatif National de l’Immunisation | In French | → Organizations and associations → Immunology and allergy → Pharmacology, toxicology |
| CCOHS | Canadian Centre for Occupational Health and Safety | In English | → Labour, labour economics |
| CCP | Complement Control Protein (modules) | In English | → Biochemistry, biophysics → Immunology and allergy |
| CCSA | Canadian Centre on Substance Abuse (www.ccsa.ca) = CCLAT (look above) |
In English | |
| CD | Cycle Day | In English | → Gynaecology |
| CDCARS | Cadres de Développement de la Capacité Autochtone de Recherche en Santé | In French | → Biological sciences |
| CDES | Comité départemental d'Éducation pour la Santé | In French | → Education → Personal health and hygiene |
| CDH | Comité Départemental d'Hygiène | In French | → Personal health and hygiene → Public health and hygiene |
| CDT | Centro de Diagnóstico y Tratamiento | In Spanish | → Diagnostics |
| CDTS | Centre Départemental de Transfusion Sanguine | In French | → Blood and circulatory system |
| CEA | Carcino-Embryonales Antigen | In German | → Biological sciences → Oncology |
| CEAV | Certificat d'Études Approfondies Vétérinaires | In French | → Education → Zoology → Veterinary medicine |
| CECOG | Central European Cooperative Oncology Group | In English | → Oncology |
| CED | Chronisch-entzündliche Darmerkrankung | In German | → Pathology |
| CEDEM | Centro de Desenvolvimento da Educação Médica | In Portuguese | → Education |
| CEFH | Centre d'Études et de Formation Hospitalière | In French | → Education |
| CEHI | Caribbean Environmental Health Institute (www.cehi.org.lc) | In English | |
| CEHM | Companion Encyclopaedia of the History of Medicine | In English | → Dictionaries → History |
| CeNGEPS | Centre National de Gestion des Essais de Produits de Santé | In French | → Pharmacology, toxicology |
| CEP | Concentré Érythrocytaire Phénotypé | In French | → Blood and circulatory system |
| CEPIS | Centro Pan-americano de Engenharia Sanitária e Ciências do Ambiente (www.cepis.ops-oms.org) = CEPIS | Centro Panamericano de Ingeniería Sanitaria y Ciencias del Ambiente | In Spanish |
In Portuguese | → Organizations and associations → Environment, environmental sciences |
| CEPIS | Centro Panamericano de Ingeniería Sanitaria y Ciencias del Ambiente (www.cepis.ops-oms.org) = (look above) |
In Spanish | → Organizations and associations → Environment, environmental sciences |
| CERAH | Centre d'Étude et de Recherche sur l'Appareillage des Handicapés | In French | |
| CEREDIH | CEntre de REférence des Déficits Immunitaires Héréditaires | In French | → Pathology |
| CERMA | Centre d'Études et de Recherches de Médecine Aéronautique | In French | → Aeronautics, aircraft |
| CERMES | Centre de recherche Médecine, Sciences, Santé et Société | In French | → Sociology → Mathematics and natural sciences |
| CESO | Centro de Estudios Superiores de Ortodoncia | In Spanish | → Dentistry |
| CESTAS | Centro di Educazione Sanitaria e Tecnologie Appropriate Sanitarie | In Italian | → Organizations and associations |
| CEyeR | Current Eye Research | In English | → Serial publications, periodicals → Biological sciences → Anatomy |
| CFAPSE | Certificat de Formation aux Activités de Premier Secours en Équipe | In French | → Education |
| CFAR | Collège Français des Anesthésistes Réanimateurs | In French | → Organizations and associations → Anesthesiology |
| CFES | Comité Français d'Éducation pour la Santé | In French | → Education → Personal health and hygiene |
| CFN | Conselho Federal de Nutricionistas | In Portuguese | → Organizations and associations → Nutrition |
| CFR | Colegiul Farmacistilor din România | In Romanian | → Organizations and associations → Pharmacology, toxicology |
| CFTE | Clinical Flexibility and Therapeutic Exercise | In English | |
| CFU-GEMM | Colony Forming Unit - Granulocyte-Erythroid-Makrophage-Megakaryocyte | In English | → Blood and circulatory system |
| CFU-MK | Colony Forming Unit - MegaKaryocytic | In English | → Blood and circulatory system |
| CGFL | Centre Georges-François Leclerc | In French | → Oncology |
| CGIH | Comité de Gestion de l'Informatique Hospitalière | In French | → Computer science |
| CGR | Concentré de Globules Rouges | In French | → Blood and circulatory system |
| CGRP | Concentré de Globules Rouges Phénotypé | In French | → Blood and circulatory system |
| CHA | Catholic Health Association | In English | → Associations → Roman catholic church |
| CHADD | Children and Adults with Attention Deficit/Hyperactivity Disorder | In English | → Psychology → Psychiatry |
| CHAR | Club d'Histoire de l'Anesthésie-Réanimation | In French | → Anesthesiology → History |
| CHARMS | Canadian Hemophilia Assessment and Resource Management Information System | In English | → Knowledge management → Blood and circulatory system → Pathology |
| CHAVI | Center for HIV-AIDS Vaccine Immunology | In English | → Research institutes → Immunology and allergy → Infectious diseases |
| CHB | Centre Hépato-Biliaire | In French | → 6163 |
| CHC | Carcinome hépatocellulaire | In French | → Oncology |
| CHG | Centre Hospitalier Général | In French | |
| CHI | Centre Hospitalier Intercommunal | In French | |
| CHIP | Children's Hospital Informatics Program | In English | → Software → Pediatry |
| CHIR | Chirurgie, Informatique et Robotique | In French | → Computer science → Surgery, orthopaedics, ophthalmology → Mechanical engineering → Electronics |
| CHLA | Canadian Health Libraries Association = ABSC | Association des Bibliothèques de la Santé du Canada | In French |
In English | → Libraries → Associations |
| CHR | Centre Hospitalier Régional | In French | |
| CHRE | Council for Healthcare Regulatory Excellence | In English | |
| CHRU | Centre Hospitalier Régional et Universitaire | In French | |
| CHS | Centre Hospitalier Spécialisé | In French | |
| CHU | Centre Hospitalier Universitaire | In French | |
| CHUV | Centre Hospitalier Universitaire Vétérinaire | In French | → Higher education, universities → Veterinary medicine |