Eponyms beginning with A
- Arakawa's syndrome I
- Arakawa's syndrome II
- Arakwa-Highashi syndrome
- Aran-Duchenne spinal muscular atrophy
- Arantius' duct
- Arantius's nodule
- Arbuthnot Lane syndrome
- Ardmore disease
- Ardmore syndrome
- Area Jonstoni
- Arey's formula
- Argonz-Ahumada-Del Castillo syndrome
- Argonz-Del Castillo syndrome
- Argyll Roberton’s pupil
- Argyll Robertson's syndrome
- Arias' syndrome (Sergio Arias Cazorla)
- Arias-Stella's effect.
- Arias-Stella's phenomenon
- Arias’ syndrome
- Arkin's disease
- Arkless-Graham syndrome
- Arlet-Ficat system
- Arloing-Courmont agglutination test
- Arlt's line
- Arlt's syndrome