/ Dictionary / Index S spermicide: Meaning and Definition of Find definitions for: sper•mi•cide Pronunciation: (spûr'mu-sīd"), [key] — n. a sperm-killing agent, esp. a commercial birth-control preparation, usually a cream or jelly. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: spermicide (Thesaurus) spermic spermidine Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language