/ Dictionary / Index S streptolysin: Meaning and Definition of Find definitions for: strep•to•ly•sin Pronunciation: (strep"tu-lī'sin), [key] — n. Bacteriol. a type of hemolysin produced by certain species of streptococcus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: streptolysin (Thesaurus) streptokinase streptomyces Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language