Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Any of various warm-blooded vertebrate animals of the class Mammalia, including humans, characterized by a covering of hair on the skin and, in the female, milk-producing mammary glands for nourishing the young.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An animal of the class Mammalia, characterized by being warm-blooded, having hair and feeding milk to its young.
  • n. A vertebrate with three bones in the inner ear and one in the jaw.

from the GNU version of the Collaborative International Dictionary of English

  • n. One of the Mammalia.

from The Century Dictionary and Cyclopedia

  • Having breasts or teats; mammiferous.
  • n. An animal of the class Mammalia.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk

Etymologies

From Late Latin mammālis, of the breast, from Latin mamma, breast; see mā-2 in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Modern Latin Mammalia, coined 1758 by Linnaeus for the class of mammals, from neuter plural of Late Latin mammalis ("of the breast"), from Latin mamma ("breast"), perhaps cognate with mamma (mother). (Wiktionary)

Examples

  • The same sort of thing was true for the term mammal in the beginning.

    Telic Thoughts

  • Also the term mammal contains much more definitional weight than just "anything that has hair and is endothermic" there's the whole vertebrate thing and air breathing is right up there as well as living etc etc.

    Telic Thoughts

  • Monotremes defy the English word mammal, which implies breasts, or at least nipples.

    Monotremata

  • For over two decades, I've been studying and writing about cetaceans, those whale and dolphin mammal cousins whose brain size, close-knit family societies, and communication skills rival our own.

    Brenda Peterson: Japan: Stop Killing Our Evolutionary Elders and Help Save Our Oceans

  • An ambassador for his imperiled species, the playful 12-year-old marine mammal is curious and energetic.

    Man-manatee alliance pools $1.5M annually

  • Bumblebee bat - World's smallest mammal is endangered in Thailand where it is known from a single national park.

    Archive 2007-01-01

  • The act contains certain conditions for "exempt hunting" that allow the killing of wild mammals with the aid of dogs — if "as soon as possible after being found or flushed out the wild mammal is shot dead by a competent person."

    Masters of the Hunt

  • But the singer hadn't jumped the fence at the enclosure, she was given special permission to meet the Latin American mammal, also known as a Brazilian aardvark, with her daughter Bluebell Madonna.

    Home | Mail Online

  • It would help if you please explain in detail how the word mammal is different than the word evolution in the sense we are discussing.

    Telic Thoughts

  • But this high-stepping mammal is not in search of cartes des visites — she’s the talisman of the Christian Louboutin boutique, which is famous for cutting-edge scarlet-soled footwear and has taken up residence in this former stationery store, and she’s just waiting for a surrealist or two to stroll in and pick up a pair of pumps. travel

    Paris Under Glass

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