/ Dictionary / Index L lymphangioma: Meaning and Definition of Find definitions for: lym•phan•gi•o•ma Pronunciation: (lim-fan"jē-ō'mu), [key] — pl. -mas, -ma•ta a benign tumor composed of dilated and newly formed lymph vessels. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lymphangioma (Thesaurus) lymphangiography lymphangitis 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