- airplane flare
- airport
- airshaft
- airspace
- airtight
- airtight seal
- airway
- airwedge
- airy points
- aisle wall
- al
- alarm
- alarm gauge
- alarm lamp
- alarm system
- alchemize
- alcohol
- alcohol varnish
- alcoholic ferment
- alcoholometer
- alder
- aleatory
- aleatory variable
- alee
- alemite fitinf
- alert
- alert broacasting
- alerting signal
- algebra
- algebraic
- algebraic code
- algebraic expression
- algebraic function
- algebraic geometry
- algebraic number
- algebraical number
- algebraically
- algefacient
- algorithmic language
- alias
- alidad
- align center
- aligned
- aligning punch
- alignment correction
- alignment mark
- alike
- alimentary abstinence
- alimentation area
- aliquation
- aliquote
- alkali
- alkali earth
- alkali wash
- alkali-proof
- alkaline accumulator
- alkaline cell
- alkaline earth
- alkaline solution
- alkaline water
- alkalinize
- alkalization
- alkalize
- Alkyd resin
- all
- all-around
- all-insulated
- all-round
- allantois
- allayer
- allergy
- alligator
- alligator clip
- allocate
- allocated band
- allocation
- allocation map
- allocation space
- allochtonous fold
- allophone
- allothigeneous
- allotment
- agonic line
- agreement
- agricultural topsoil
- agro-forestry
- aground
- aholonomic
- aim
- aiming field
- air bearing
- air blower
- air brake
- air case
- air cell
- air channel
- air choke
- air circularity
- air cleaner
- air cleaning