/ Dictionary / Index L lymphotoxin: Meaning and Definition of Find definitions for: lym•pho•tox•in Pronunciation: (lim"fu-tok'sin), [key] — n. Immunol. a glycoprotein that is released by antigen-stimulated or mitogen-stimulated T cells and is toxic to various other cells. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lymphosarcoma lymphotrophic Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language