/ Dictionary / Index P parthenospore: Meaning and Definition of Find definitions for: par•the•no•spore Pronunciation: (pär'thu-nu-spôr", -spōr"), [key] — n. Biol. a spore developed without fertilization. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Parthenos Parthia Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language