- Asperger's syndrome
- aortic plexus
- ades
- aneurysmatic
- aneurysmal
- aortic
- AAA
- anovular haemorrhage
- anova
- anovulatory cycle
- antiperistaltic agent
- anoxaemia
- antipenultimate shell
- antiphonal
- anatomic barrier
- anatomic uterine defect
- adult respiratory distress syndrome
- a kind of drum
- aster divaricatus
- attending medical staff
- Arctic char
- a matter to be lost and gone
- any man
- anthracite coal
- a तरंग
- ante meridiem
- a.m.
- amnic
- amnio_ectodermal
- audiology
- a word of address or a vocative word for a child
- alphabetic
- alphabetic character set
- allograft
- allometric
- apery
- an injury
- a wound
- a letter_box
- an establishment
- a circle
- a kind of
- a letter of exchange
- aisle
- alley_ ways
- a lane
- a square
- a class
- acculturation
- an exceptionally charming woman (the first of the kinds specified by ancient indian sexologists)