/ Dictionary / Index P phytocide: Meaning and Definition of Find definitions for: phy•to•cide Pronunciation: (fī'tu-sīd"), [key] — n. a substance or preparation for killing plants. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. phytochrome phytoclimate Related Content Daily Word Quiz: topography Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language