/ Dictionary / Index P polyspermy: Meaning and Definition of Find definitions for: pol•y•sper•my Pronunciation: (pol'ē-spûr"mē), [key] — n. the fertilization of an ovum by several spermatozoa. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. polyspermia polystichous Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language