- ammonia water
- ammoniacal liquor
- among
- amorphic
- amorphous
- amorphous wax
- amortissue
- amortize
- amp-turn
- amperage
- ampere balance
- ampere-hour
- ampere-winding
- ampersand
- amphitheatre
- amphoteric
- amplification coefficient
- amplification factor
- amplified
- amplifier bandwidth
- amplify
- amplitude clipper
- amplitude code
- amplitude fading
- amplitude gate
- amplitude limiter
- ampoule
- anabolergy
- anaerobic digester
- analectic
- analog adder
- analog backup
- analog calculator
- analog channel
- analog equipment
- analog machine
- analog microcircuit
- analog network
- analog plotter
- analog recording
- analog transistor
- analog transmission
- analogical reasoning
- analogous
- analogous circuit
- analogue
- analogue calculators
- analogue computer
- analogue device
- analogue machine
- analogy
- analyse
- analysis
- analysis graphics
- analysis programme
- analysis routine
- analytic continuation
- analytic geometry
- analytic method
- analytical
- analytical function
- analyze
- anamnesis
- anaphoresis
- anastigmatic lens
- anastomotic vessel
- anchor
- anchor block
- anchor buoy
- anchor chain
- anchor column
- anchor ice
- anchor loop
- anchor pin
- anchor pole
- anchor position
- anchor record
- anchor ring
- anchor screw
- anchor strut
- anchor tower
- anchorage buoy
- anchorage cover
- antenna
- antenna amplifier
- antenna booster
- antenna coil
- antenna coupler
- antenna gain
- antenna impedance
- antenna mast
- antenna pattern
- antenna reflector
- antenna resistance
- antenna rod
- antenna tower
- antependium
- antergia
- anteroom
- antherozoid