/ Dictionary / Index S syngamy: Meaning and Definition of Find definitions for: syn•ga•my Pronunciation: (sing'gu-mē), [key] — n. Biol. union of gametes, as in fertilization or conjugation; sexual reproduction. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. synfuel syngas Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language