- access type
- accessible compressor
- accessory
- accessory shoe
- accessway
- accident condition
- accident-prone
- accidental inflection
- accompany
- accompanying papers
- accomplish
- accord
- accordion fold
- accordion partition
- account data
- account number
- accountable time
- accounting area
- accounting data
- accounting process
- accounting program
- accounting report
- accounting software
- accounting symbol
- accretion
- accrued income
- accumulate
- accumulated deviation
- accumulated dose
- accumulation layer
- accumulative carry
- accumulative timing
- accumulator cell
- accumulator driver
- accumulator railcar
- accuracy rating
- accurate
- acetal
- acetic acid
- acetylene blowpipe
- acetylene cylinder
- acetylene line
- acetylene welding
- achromat
- achromatic Lenz
- achromatic net
- achromatize
- acicular
- acid
- acid badging