Definition of Mammalia
1. Noun. Warm-blooded vertebrates characterized by mammary glands in the female.
Exact synonyms: Class MammaliaMember holonyms: Young Mammal,
Mammal,
Mammalian,
Prototheria,
Subclass Prototheria,
Pantotheria,
Subclass Pantotheria,
Metatheria,
Subclass Metatheria,
Eutheria,
Subclass Eutheria,
Ungulata,
UnguiculataGroup relationships: Craniata,
Subphylum Craniata,
Subphylum Vertebrata,
VertebrataGeneric synonyms: Class Definition of Mammalia
1. n. pl. The highest class of Vertebrata. The young are nourished for a time by milk, or an analogous fluid, secreted by the mammary glands of the mother.
Definition of Mammalia
1. Noun. (obsolete) (alternative capitalization of Mammalia) ¹
¹ Source: wiktionary.com
Medical Definition of Mammalia
1.
The highest class of Vertebrata. The young are nourished for a time by milk, or an analogous fluid, secreted by the mammary glands of the mother.
Mammalia are divided into three subclasses;
I. Placentalia. This subclass embraces all the higher orders, including man. In these the foetus is attached to the uterus by a placenta.
II. Marsupialia. In these no placenta is formed, and the young, which are born at an early state of development, are carried for a time attached to the teats, and usually protected by a marsupial pouch. The opossum, kangaroo, wombat, and koala are examples.
III. Monotremata. In this group, which includes the genera Echidna and Ornithorhynchus, the female lays large eggs resembling those of a bird or lizard, and the young, which are hatched like those of birds, are nourished by a watery secretion from the imperfectly developed mammae.
Origin: NL, from L. Mammalis. See Mammal.
(20 Mar 1998)
Lexicographical Neighbors of Mammalia
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