/ Dictionary / Index S spermatotoxin: Meaning and Definition of Find definitions for: sper•mat•o•tox•in Pronunciation: (spûr-mat"u-tok'sin, spûr'mu-tu-), [key] — n. spermotoxin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spermatotoxic spermatozoid Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language