In organic chemistry, the term cyanomethyl (cyanide (N≡C) + methyl (CH3)) designates:

A cyanomethyl group (N≡CCH2–), a type of nitrile group The cyanomethyl radical (N≡CCH2·) The cyanomethyl carbanion (N≡CCH2−)

See also Ethynyl Hydroxymethyl Trifluoromethyl