/ Dictionary / Index L leucotome: Meaning and Definition of Find definitions for: leu•co•tome Pronunciation: (l'ku-tōm"), [key] — n. Surg. an instrument for dissecting the white matter of the brain, consisting of a cannula containing a slender rotating blade. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. leucothoe leucotomy 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