- analog digital conversion
- alcoholomania
- attemperated
- adducent
- abdpminoscopy
- absolutist
- absolute order
- adamantine
- adamantinoma
- a man of principles
- adverse drug reaction
- adversative conjunction
- a wrong path
- andorra
- antibonding molecular orbital
- a lively and carefree person
- abrasive band
- abrasive
- abrasive dise
- abnodation
- abnormal gradient
- abnormal forest
- antithixotropy
- antithetic
- a typical copulative
- at cross purposes
- antitetanic serum
- antipodal
- antipodes
- at variance with
- additive inverse
- a protocol
- Arianism
- antinomianism
- adhesive tendinitis
- ask for a quarrel
- aspirator
- athlete's heart
- arciform artery
- at dusk
- at every step
- athletic
- asssure
- ashurbanipal
- asurbanipal
- argent
- argentaffine tumour
- additions and alterations
- an inkpot
- a cut_motion