/ Dictionary / Index P piroplasm: Meaning and Definition of Find definitions for: pir•o•plasm Pronunciation: (pir'u-plaz"um), [key] — n. babesia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: piroplasm (Thesaurus) pirogue piroplasmosis Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language