- a colorless, toxic gas, HC?CO, with a penetrating odor, made by passing acetone or acetic acid through hot metal tubes: used esp. as an acetylating agent
- any of a series of related organic compounds containing the C?CO group
Origin of keteneket(o)- + -ene
A pungent, toxic, colorless gas, C2H2O, used chiefly as an acetylation agent.