- ammeter shunt
- ammonia absorber
- ammonia absorption
- ammonia addition
- ammonia characteristics
- ammonia charge
- ammonia charging
- ammonia circuit
- ammonia circulation
- ammonia compressor
- ammonia concentration
- ammonia condenser
- ammonia consumption
- ammonia contaminant
- ammonia cycle
- ammonia escape
- ammonia evaporation
- ammonia evaporator
- ammonia gas
- ammonia leak
- ammonia level
- ammonia pipe
- ammonia piping
- ammonia pump
- ammonia receiver
- amorphous body
- amorphous semiconductor
- amp-hr
- ampere theorem
- ampere-turn
- amphoteric substance
- amplitude curve
- amplitude distortion
- amplitude equalizer
- amplitude permeability
- amplitude response
- amplitude-modulated
- analog calculation
- analog states
- analyser
- analyzer
- anastigmat
- anchor clamp
- anchor support
- ancillary equipment
- angular field
- annealing point
- annular eclipse
- annular passage
- annulus
- anorthic lattice
- answer signal
- antapex
- antenna coincidence
- antenna scanner
- anteroom temperature
- angle compressor
- angle modulation
- angular displacement
- angular distribution
- angular resolution
- anhedral crystal
- anisometric
- anisotropic body
- anisotropy constant
- annealing texture
- annual aberration
- annular space
- anode
- anode zone
- anodic reaction
- anodising
- anolyte
- anomaloscope
- anomalous absorption
- anomalous expansion
- anorthic
- answering cord
- answering jack
- answering lamp
- ammonia recirculation
- ammonia refrigeration
- ammonia solution
- ammonia spirit
- ammonia-operated
- ammoniate
- ammoniation
- ammonify
- amorphous solid
- amortisseur winding
- amp-turn
- ampere balance
- ampere currents
- ampere-hour
- amplified
- amplitude noise
- amplitude splitting
- anaerobic process
- anaesthetic refrigerant
- analog computation