aque - auxo
- arachin
- arachis nut oil
- arachis oil
- aracite
- aralac
- araldite
- aralen
- aralkyl
- aramid
- aramite
- arasan
- aratein
- arbitrary constant
- arbitrary function
- arborescence
- arborized
- arbutin
- arbutoside
- arc resistance
- arc tracking
- arc welding
- arc-ignition test
- arch
- archangel tar
- arched
- arched tire
- arching
- architectural coating
- arcwise
- Ardichvili equation
- ardichvili equation
- ardil
- area burning rate
- area coefficient of cord
- area factor
- area of injection plunger
- area of passage
- area of surface
- area per unit volume
- area stability
