[mam-uh l] /ˈmæm əl/

any vertebrate of the class Mammalia, having the body more or less covered with hair, nourishing the young with milk from the mammary glands, and, with the exception of the egg-laying monotremes, giving birth to live young.
any animal of the Mammalia, a large class of warm-blooded vertebrates having mammary glands in the female, a thoracic diaphragm, and a four-chambered heart. The class includes the whales, carnivores, rodents, bats, primates, etc

1826, anglicized form of Modern Latin Mammalia (1773), 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.
Any of various warm-blooded vertebrate animals of the class Mammalia, whose young feed on milk that is produced by the mother’s mammary glands. Unlike other vertebrates, mammals have a diaphragm that separates the heart and lungs from the other internal organs, red blood cells that lack a nucleus, and usually hair or fur. All mammals but the monotremes bear live young. Mammals include rodents, cats, dogs, ungulates, cetaceans, and apes.


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  • Mammalgia

    mammalgia mam·mal·gi·a (mā-māl’jē-ə, -jə) n. See mastodynia.

  • Mammalia

    n. 1773, from Modern Latin (Linnaeus), from neuter plural of Late Latin mammalis, from mamma (see mammal).

  • Mammalians

    [muh-mey-lee-uh n, -meyl-yuh n] /məˈmeɪ li ən, -ˈmeɪl yən/ noun 1. an animal of the class Mammalia; mammal. adjective 2. belonging or pertaining to the class Mammalia; characteristic of mammals. adj. 1813, from mammal + -ian. As a noun, from 1835.

  • Mammalogist

    [muh-mal-uh-jee] /məˈmæl ə dʒi/ noun 1. the science dealing with . /mæˈmælədʒɪ/ noun 1. the branch of zoology concerned with the study of mammals mammalogy (mā-māl’ə-jē, -mŏl’-) The scientific study of mammals.

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