/ Dictionary / Index L lymphosarcoma: Meaning and Definition of Find definitions for: lym•pho•sar•co•ma Pronunciation: (lim"fō-sär-kō'mu), [key] — n. Pathol. a malignant tumor in lymphatic tissue, caused by the growth of abnormal lymphocytes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lymphopoiesis lymphotoxin 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