MAMMAL

[mam.mal] n [NL Mammalia, fr. LL, neut. pl. of mammalis of the breast, fr. L mamma breast] (1826): any of a class (Mammalia) of warm-blooded higher vertebrates (as placentals, marsupials, or monotremes) that nourish their young with milk secreted by mammary glands, have the skin usu. more or less covered with hair, and include humans -- mam.ma.li.an adj or n