- axodendritic synapse
- amelanotic melanoma
- a devilish deed
- a horde of mischief_mongers
- a place in the sun
- a woman who goes to meet her lover or keeps an assignation
- agrostis alba
- american water shrew
- acquired toxoplasmosis
- a lump of flesh
- appositeness
- all_pervasive
- a female mouse
- a documentary (film)
- amphopeptone
- archiannelid
- anglesey island
- anglian
- allantoin
- as sure as hell
- any disorderly stuff
- any condition which excites or develops a particular state or mind or body
- aeneas silvius
- a hamadryad
- a repeated crackle or smack
- Albigensianism
- alleghenies
- african country
- asian country
- american dream
- anteflexed
- altair
- at length
- arithmetic register
- arithmetic primary
- adonidoside
- amphiarthrosis
- asthenic habitus
- alveolar hypoventilation
- an empire
- anorexiant drug
- auditopsychic
- andreas vesalius
- anthocyanin
- actinic dermatitis
- atopic dermatitis
- anne mansfield sullivan
- acute inclusion body encephalitis
- american standard code
- amnesic aphasia