/ Dictionary / Index P phytoplasm: Meaning and Definition of Find definitions for: phy•to•plasm Pronunciation: (fī'tu-plaz"um), [key] — n. protoplasm of a plant or plants. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. phytoplankton phytosaur 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