alph - ante
- alpha alcoholism
- alpha blocking
- alpha blocking phenomenon
- alpha press
- alpha rhythm
- alpha wave
- alpha-activity
- alphanumeric
- alphanumeric characters
- alphanumerical
- alter ego
- alter-egoism
- alteration
- alteration in the sensory input
- alteration of arousal
- alteration of attention
- altered alertness
- altered day length
- altered judgement
- altered sensory environment
- altered state of consciousness
- alternate (group) meetings
- alternating responses strategy
- alternative (group) meetings
- alternative group sessions
- alternobaric
- alternobaric vertigo
- altimeter-aneroid
- altitude (pressure) suit
- altitude (test) chamber
- altitude breathing
- altitude bust
- altitude chamber experience
- altitude chamber run
- altitude deacclimatization
- altitude display
- altitude dysbarism
- altitude flight
- altitude gage
- altitude gyration
