/ Dictionary / Index P polyspermia: Meaning and Definition of Find definitions for: pol•y•sper•mi•a Pronunciation: (pol"ē-spûr'mē-u), [key] — n. Med. the secretion of an excessive amount of semen. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. polysomnogram polyspermy 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