/ Dictionary / Index L lysosome: Meaning and Definition of Find definitions for: ly•so•some Pronunciation: (lī'su-sōm"), [key] — n. Cell Biol. a cell organelle containing enzymes that digest particles and that disintegrate the cell after its death. See diag. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lysosome (Thesaurus) Lysol lysozyme Related Content Daily Word Quiz: heifer Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language