/ Dictionary / Index S synthol: Meaning and Definition of Find definitions for: syn•thol Pronunciation: (sin'thôl, -thol), [key] — n. Chem. a synthetic motor fuel produced by heating, under pressure, hydrogen and carbon monoxide in the presence of a catalyst. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. synthetize synthpop Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language