/ Dictionary / Index L lysis: Meaning and Definition of Find definitions for: ly•sis Pronunciation: (lī'sis), [key] — n. the dissolution or destruction of cells by lysins. the gradual recession of a disease. Cf.(def. 4). -lysis Pronunciation: [key] a combining form with the meaning “breaking down, loosening, decomposition,” used in the formation of compound words: analysis; electrolysis; paralysis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lysis (Thesaurus) Lysippus Lysistrata* Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language