/ Dictionary / Index H heptane: Meaning and Definition of Find definitions for: hep•tane Pronunciation: (hep'tān), [key] — n. any of nine isomeric hydrocarbons, CH, of the alkane series, some of which are obtained from petroleum: used in fuels as solvents, and as chemical intermediates. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: heptane (Thesaurus) heptameter heptanedioic acid Related Content Daily Word Quiz: braggart Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language