/ Dictionary / Index H hydrocarbon: Meaning and Definition of Find definitions for: hy•dro•car•bon Pronunciation: (hī"dru-kär'bun, hī'dru-kär"-), [key] — n. any of a class of compounds containing only hydrogen and carbon, as an alkane, methane, CH, an alkene, ethylene, CH, an alkyne, acetylene, CH, or an aromatic compound, benzene, CH. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hydrocarbon (Thesaurus) hydrobromide hydrocele Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language