• synonyms


[ kee-teen ]
/ ˈki tin /

noun Chemistry.

a colorless, poisonous gas, C2H2O, irritating to the lungs, prepared from acetone or acetic acid by pyrolysis: used chiefly in the manufacture of certain commercial chemicals, as acetic anhydride and aspirin.

Nearby words

ketch, ketch-rigged, ketchikan, ketchup, kete, ketene, keto, keto acid, keto form, keto-, keto-enol tautomerism

Origin of ketene

First recorded in 1905–10; ket- + -ene Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for ketene


/ (ˈkiːtiːn, ˈkɛt-) /


a colourless irritating toxic gas used as an acetylating agent in organic synthesis. Formula: CH 2 :COAlso called: ethonone
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012