/ Dictionary / Index S spermous: Meaning and Definition of Find definitions for: sper•mous Pronunciation: (spûr'mus), [key] — adj. of the nature of or pertaining to sperm. -spermous Pronunciation: [key] var. ofgymnospermous. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: spermous (Thesaurus) spermotoxin sperm whale Related Content Daily Word Quiz: candor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language