- acetylene poisoning
- acetylene production from natural gas
- acetylene purification
- acetylene reactor
- acetylene reduction assay
- acetylenic acid
- acetylenic polymer
- acetylenyl benzene
- acetylglucosaminidase
- acetylide
- acetylide; alkynide
- acetyltransferase
- ACFIC
- ACFP flue gas desulphurization process
- ACFROC
- ACFTC
- ACFTU
- ACG
- AC generator
- ACh
- Ach
- Achaean League
- Achaeans
- achalasia
- A Champion Scholar Betrayed His Wife