

| Acronym | Sense | Language | Topics | 
|---|---|---|---|
| A | Adenosine | In English | → Genetics → Biochemistry, biophysics | 
| A | Ampere | In English | → Electrical engineering | 
| A | Alanine = A | অ্যালানিন | In Bengali = A | Alanina | In Catalan = A | Alanin | In Czech = A | Alanin | In Danish = A | Alanin | In German = A | Αλανίνη | In Greek = A | Alanina | In Spanish = A | Alanino | In Esperanto = A | Alanine | In French = A | Alanina | In Galician = A | 알라닌 | In Korean = A | Alanin | In Croatian = A | Alanin | In Indonesian = A | Alanina | In Italian = A | אלנין | In Hebrew = A | Alanīns | In Latvian = A | Alanin | In Letzeburgesh = A | Alaninas | In Lithuanian = A | Alanin | In Hungarian = A | Alanine | In Dutch = A | アラニン | In Japanese = A | آلانين | In Pashto = A | Alanina | In Polish = A | Alanina | In Portuguese = A | Alanină | In Romanian = A | Аланин | In Russian = A | Alanín | In Slovak = A | Аланин | In Serbian = A | Alanin | In Sundanese = A | Alaniini | In Finnish = A | Alanin | In Swedish = A | Alanin | In Turkish = A | Аланін | In Ukrainian = A | 丙氨酸 | In Chinese | In English | → Biochemistry, biophysics | 
| A | অ্যালানিন = (look above) | In Bengali | → Biochemistry, biophysics | 
| A | Alanina = (look above) | In Catalan | → Biochemistry, biophysics | 
| A | Alanin = (look above) | In Czech | → Biochemistry, biophysics | 
| A | Alanin = (look above) | In Danish | → Biochemistry, biophysics | 
| A | Alanin = (look above) | In German | → Biochemistry, biophysics | 
| A | Αλανίνη = (look above) | In Greek | → Biochemistry, biophysics | 
| A | Alanina = (look above) | In Spanish | → Biochemistry, biophysics | 
| A | Alanino = (look above) | In Esperanto | → Biochemistry, biophysics | 
| A | Alanine = (look above) | In French | → Biochemistry, biophysics | 
| A | Alanina = (look above) | In Galician | → Biochemistry, biophysics | 
| A | 알라닌 = (look above) | In Korean | → Biochemistry, biophysics | 
| A | Alanin = (look above) | In Croatian | → Biochemistry, biophysics | 
| A | Alanin = (look above) | In Indonesian | → Biochemistry, biophysics | 
| A | Alanina = (look above) | In Italian | → Biochemistry, biophysics | 
| A | אלנין = (look above) | In Hebrew | → Biochemistry, biophysics | 
| A | Alanīns = (look above) | In Latvian | → Biochemistry, biophysics | 
| A | Alanin = (look above) | In Letzeburgesh | → Biochemistry, biophysics | 
| A | Alaninas = (look above) | In Lithuanian | → Biochemistry, biophysics | 
| A | Alanin = (look above) | In Hungarian | → Biochemistry, biophysics | 
| A | Alanine = (look above) | In Dutch | → Biochemistry, biophysics | 
| A | アラニン = (look above) | In Japanese | → Biochemistry, biophysics | 
| A | آلانين = (look above) | In Pashto | → Biochemistry, biophysics | 
| A | Alanina = (look above) | In Polish | → Biochemistry, biophysics | 
| A | Alanina = (look above) | In Portuguese | → Biochemistry, biophysics | 
| A | Alanină = (look above) | In Romanian | → Biochemistry, biophysics | 
| A | Аланин = (look above) | In Russian | → Biochemistry, biophysics | 
| A | Alanín = (look above) | In Slovak | → Biochemistry, biophysics | 
| A | Аланин = (look above) | In Serbian | → Biochemistry, biophysics | 
| A | Alanin = (look above) | In Sundanese | → Biochemistry, biophysics | 
| A | Alaniini = (look above) | In Finnish | → Biochemistry, biophysics | 
| A | Alanin = (look above) | In Swedish | → Biochemistry, biophysics | 
| A | Alanin = (look above) | In Turkish | → Biochemistry, biophysics | 
| A | Аланін = (look above) | In Ukrainian | → Biochemistry, biophysics | 
| A | 丙氨酸 = (look above) | In Chinese | → Biochemistry, biophysics | 
| A | Aperture | In English | → Photography |