/ Dictionary / Index S spermato-: Meaning and Definition of Find definitions for: spermato- Pronunciation: [key] a combining form meaning “seed”; used with this meaning and as a combining form of in the formation of compound words:Cf. spermatogonium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spermatium spermatocide Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language