Definition of mammalia

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Mammalia (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..

Lern More About Mammalia

Monodelphia :: Monodelphia (n. pl.) The group that includes all ordinary or placental mammals; the Placentalia. See Mammalia.
Zonaria :: Zonaria (n. pl.) A division of Mammalia in which the placenta is zonelike.
Cheiroptera :: Cheiroptera (n. pl.) An order of mammalia, including the bats, having four toes of each of the anterior limbs elongated and connected by a web, so that they can be used like wings in flying. See Bat..
Gyrencephala :: Gyrencephala (n. pl.) The higher orders of Mammalia, in which the cerebrum is convoluted..
Monotremata :: Monotremata (n. pl.) A subclass of Mammalia, having a cloaca in which the ducts of the urinary, genital, and alimentary systems terminate, as in birds. The female lays eggs like a bird. See Duck mole, under Duck, and Echidna..
Taxeopoda :: Taxeopoda (n. pl.) An order of extinct Mammalia found in the Tertiary formations.
Pseudocoelia :: Pseudocoelia (n.) The fifth ventricle in the mammalian brain. See Ventricle.
Ovulation :: Ovulation (n.) The formation of ova or eggs in the ovary, and the discharge of the same. In the mammalian female the discharge occurs during menstruation..
Mammal :: Mammal (n.) One of the Mammalia.
Breast :: Breast (n.) Either one of the protuberant glands, situated on the front of the chest or thorax in the female of man and of some other mammalia, in which milk is secreted for the nourishment of the young; a mamma; a teat..
Mammalian :: Mammalian (a.) Of or pertaining to the Mammalia or mammals.
Mammifer :: Mammifer (n.) A mammal. See Mammalia.
Deciduata :: Deciduata (n. pl.) A group of Mammalia in which a decidua is thrown off with, or after, the fetus, as in the human species..
Marsupialia :: Marsupialia (n. pl.) A subclass of Mammalia, including nearly all the mammals of Australia and the adjacent islands, together with the opossums of America. They differ from ordinary mammals in having the corpus callosum very small, in being implacental, and in having their young born while very immature. The female generally carries the young for some time after birth in an external pouch, or marsupium. Called also Marsupiata..
Tillodontia :: Tillodontia (n. pl.) An extinct group of Mammalia found fossil in the Eocene formation. The species are related to the carnivores, ungulates, and rodents. Called also Tillodonta..
Mammalogy :: Mammalogy (n.) The science which relates to mammals or the Mammalia. See Mammalia.
Bimana :: Bimana (n. pl.) Animals having two hands; -- a term applied by Cuvier to man as a special order of Mammalia.
Order :: Order (n.) An assemblage of genera having certain important characters in common; as, the Carnivora and Insectivora are orders of Mammalia..
Mammiferous :: Mammiferous (a.) Having breasts; of, pertaining to, or derived from, the Mammalia..
Lyencephala :: Lyencephala (n. pl.) A group of Mammalia, including the marsupials and monotremes; -- so called because the corpus callosum is rudimentary..
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