Medical term:
Mammalia
Mam·ma·li·a
(mă-mā'lē-ă),The highest class of living organisms; it includes all the vertebrate animals (monotremes, marsupials, and placentals) that suckle their young, possess hair, and (except for the egg-laying monotremes) bring forth living young rather than eggs.
[L. mamma, breast]
Farlex Partner Medical Dictionary © Farlex 2012
Mam·ma·li·a
(mă-mā'lē-ă)The highest class of living organisms; includes all vertebrate animals (monotremes, marsupials, and placentals) that suckle their young, possess hair, and (except for the egg-laying monotremes) bring forth living young rather than eggs.
[L. mamma, breast]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
mammal
[mam´al]an individual of the Mammalia, a division of vertebrates, including all that possess hair and suckle their young. adj., adj mammal´ian.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
mam·mal
(mam'ăl),An animal of the class Mammalia.
Farlex Partner Medical Dictionary © Farlex 2012
mammal
(măm′əl)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.
mam·ma′li·an (mă-mā′lē-ən) adj. & n.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
mammal
any animal of the class Mammalia, a group of about 4250 species, often regarded as the most highly evolved animals, and so named because they all possess MAMMARY GLANDS. There are three living subclasses:- Monotremata - MONOTREMES, primitive egg-laying mammals such as the duck-billed platypus and Echidna, the spiny ant eater.
- Marsupialia - MARSUPIALS, which transfer their young to pouches for the latter part of their early development.
- Eutheria - EUTHERIANS, which have a placenta.
Mammals are characterized by the presence of hair, a DIAPHRAGM used in AERIAL RESPIRATION, milk secretion in the female (LACTATION) for suckling the young, presence of only the left systemic arch in the blood circulatory system, three auditory ossicles in the ear, and a lower jaw of a single pair of bones. In all classes except the monotremes, the young are born live (see VIVIPAROUS).
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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