/ Dictionary / Index S spermine: Meaning and Definition of Find definitions for: sper•mine Pronunciation: (spûr'mēn, -min), [key] — n. Biochem. a polyamine, HN(CH)NH(CH)NH(CH)NH, formed from spermidine and occurring in all cells, esp. prevalent in semen, sputum, pancreatic tissue, and certain yeasts. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spermidine spermiogenesis Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language