/ Dictionary / Index L lysozyme: Meaning and Definition of Find definitions for: ly•so•zyme Pronunciation: (lī'su-zīm"), [key] — n. Biochem. an enzyme that is destructive of bacteria and functions as an antiseptic, found in tears, leukocytes, mucus, egg albumin, and certain plants. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lysozyme (Thesaurus) lysosome lyssophobia Related Content Daily Word Quiz: lyre Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language