/ Dictionary / Index A algicide: Meaning and Definition of Find definitions for: al•gi•cide Pronunciation: (al'ju-sīd"), [key] — n. a substance or preparation for killing algae. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. -algia algid Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language