- aiming symbol
- aimless
- active carrier
- active area
- Ahura
- Aditya
- Asvins
- a devotee of
- allotropism
- allotropy
- allowable
- authenticator
- appraising
- appraiser
- a valve
- aortic septal defect
- aortic valve
- active citizen
- ad valorem
- allowed
- allowably
- allowance
- a wind_mill
- avascular
- amyl nitrate
- amlodipine besylate
- a swollen mind
- a fat purse
- a flash
- a fraction
- agrostis canina
- african nation
- allomerism
- andrena
- adulteration
- animalisation
- a gradient
- a vulnerable point
- aphakic
- aphonic
- aby moritz warburg
- american bugbane
- Anzac
- a professional warrior
- arneth count
- as nothing of a match
- a lump of human
- a stupid fellow
- a lung
- amiss