acid - alde
- acute triangle
- acutiflorous
- acutifoliate
- acyclicity
- acyesis
- acyl
- acylation
- ad libitum sampling
- adamant
- adamantine
- adapt
- adaptability equalizer
- adaptable
- adaptation power
- adaptation syndrome
- adapted
- adapted virus
- adapter
- adapter coupling
- adapting
- adaptiogenesis
- adaptive
- adaptive behavior
- adaptive correlator
- adaptive delta-modulation
- adaptive evolution
- adaptive flexibility
- adaptive immune response
- adaptive immunity
- adaptive norm
- adaptive radiation
- adaptive receiver
- adaptive value
- adatom
- adaxial
- ADC
- Adcock antenna
- Adcock direction finder
- add
- add-in
