/ Dictionary / Index R rodenticide: Meaning and Definition of Find definitions for: ro•den•ti•cide Pronunciation: (rō-den'tu-sīd"), [key] — n. a substance or preparation for killing rodents. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Rodentia rodent ulcer Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language