- abandonment
- abb
- ablation
- abnormal pressure
- abnormal stress
- abnormal structure
- abnormal variation
- abrasive wear
- absolute alcohol
- absolute atmosphere
- absolute control
- absolute porosity
- absolute system
- absorbent cotton
- absorber capacity
- absorber column
- absorber tube
- absorption column
- absorption gasoline
- absorption loss
- absorption oil
- absorption process
- abura
- abyssal depth
- accelerated agent
- accelerating agent
- accelerating tube
- accelerator pump
- acceptance test
- acceptor level
- accessory element
- accompanying mineral
- accumulation tank
- acetate
- acetic
- acetification
- acetous
- acetyl chloride
- acetylated cotton
- acetylencic hydrocarbon
- acetylene black
- acetylene cutting
- acetylene generator
- acetylenic
- abandoned
- abandoned beach
- abandoned cliff
- abandoned well
- Abbe refractometer
- ablation moraine