The definition of a mammal is a type of warm-blooded animal that breast feeds their babies and usually has hair.(noun)
See mammal in Webster's New World College Dictionary
Origin: < ModL Mammalia < LL mammalis, of the breasts < L mamma: see mamma
See mammal in American Heritage Dictionary 4
Origin: From Late Latin mammālis, of the breast
Origin: , from Latin mamma, breast; see mā-2 in Indo-European roots.
Learn more about mammal