Definition of "mammalia" [‖Mam•ma•li•a]

• Alternative capitalization of Mammalia (noun)

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• "Grasps the nutrient organ whence the term mammalia,"
• "The order mammalia is the resultant of a primary sex-distinction developed by natural selection; but the gorgeous plumage of the peacock's tail is a secondary sex-distinction developed by sexual selection."
• "The mammalia are the class which suckle their young; second to them are the BIRDS; and then the blood cools, the organisation is inferior, and the REPTILES are produced; and lastly come the FISHES, with cold blood, and wanting aerial lungs."