[¦ən′sach·ə‚rād·əd ¦hī·drə′kär·bən] (organic chemistry) One of a class of hydrocarbons that have at least one double or triple carbon-to-carbon bond that is not in an aromatic ring; examples are ethylene, propadiene, and acetylene.
unsaturated hydrocarbon
unsaturated hydrocarbon
A hydrocarbon in which carbon atoms share two or three pairs of electrons.See also: hydrocarbon