Breadcrumb Home > Dictionary > Index M mammalian: Meaning and Definition of Find definitions for: mam•ma•li•an Pronunciation: (mu-mā'lē-un, -māl'yun), [key] — n. an animal of the class Mammalia; mammal. —adj. belonging or pertaining to the class Mammalia; characteristic of mammals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mammalian (Thesaurus) mammal mammalogy ✖ Related Content Daily Word Quiz: tendentious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language