air - anti
- alligator clip
- alligator connector
- alligator crack
- alligator grab
- alligator shears
- alligator skin
- alligator wrench
- alligatoring
- Allis-Chalmers agglomeration reduction process
- allocate
- allocated (frequency )band
- allocated (frequency )band
- allocated channel
- allocated frequency
- allocation
- allocation map
- allocation of reservoir capacity
- allocation phase
- allocation scheme
- allocator
- allochthonous coal
- alloocimene
- alloprene
- allostery
- allot
- allotment
- allotropic modification
- allotropy
- allotter
- allotter relay
- allotter [allotting] switch
- allowable
- allowable bearing
- allowable burnup
- allowable catch
- allowable clearance
- allowable deflection
- allowable exposure
- allowable leak rate
- allowable level