/ Dictionary / Index M melanin: Meaning and Definition of Find definitions for: mel•a•nin Pronunciation: (mel'u-nin), [key] — n. any of a class of insoluble pigments, found in all forms of animal life, that account for the dark color of skin, hair, fur, scales, feathers, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: melanin (Thesaurus) Melanie Melanion Related Content Daily Word Quiz: languid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language