/ Dictionary / Index Z zygospore: Meaning and Definition of Find definitions for: zy•go•spore Pronunciation: (zī'gu-spôr", -spōr", zig'u-), [key] — n. Bot., Mycol. a cell formed by fusion of two similar gametes, as in certain algae and fungi. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: zygospore (Thesaurus) zygosporangium zygote Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language