/ Dictionary / Index L lipotropin: Meaning and Definition of Find definitions for: lip•o•tro•pin Pronunciation: (lip"u-trō'pin, lī"pu-), [key] — n. Biochem. a large polypeptide of the pituitary gland from which endorphins and other endogenous opiates are thought to derive. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lipotropic Lippe 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