hydrocarbon n 1: an organic compound containing only carbon and hydrogen
Hydrocarbon \Hy`dro*car"bon\, n. [Hydro-, 2 + carbon.] (Chem.) A compound containing only hydrogen and carbon, as methane, benzene, etc.; also, by extension, any of their derivatives. [1913 Webster] {Hydrocarbon burner}, {furnace}, {stove}, a burner, furnace, or stove with which liquid fuel, as petroleum, is used. [1913 Webster]