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

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..
Dermoptera :: Dermoptera (n. pl.) An order of Mammalia; the Cheiroptera.
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..
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..
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..
Pseudocoelia :: Pseudocoelia (n.) The fifth ventricle in the mammalian brain. See Ventricle.
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..
Implacentalia :: Implacentalia (n. pl.) A primary division of the Mammalia, including the monotremes and marsupials, in which no placenta is formed..
Mammal :: Mammal (n.) One of the Mammalia.
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..
Mammaliferous :: Mammaliferous (a.) Containing mammalian remains; -- said of certain strata.
Mammalian :: Mammalian (a.) Of or pertaining to the Mammalia or mammals.
Zonaria :: Zonaria (n. pl.) A division of Mammalia in which the placenta is zonelike.
Unguiculata :: Unguiculata (n. pl.) An extensive division of Mammalia including those having claws or nails, as distinguished from the hoofed animals (Ungulata)..
Herbivora :: Herbivora (n. pl.) An extensive division of Mammalia. It formerly included the Proboscidea, Hyracoidea, Perissodactyla, and Artiodactyla, but by later writers it is generally restricted to the two latter groups (Ungulata). They feed almost exclusively upon vegetation..
Toxodonta :: Toxodonta (n.pl.) An extinct order of Mammalia found in the South American Tertiary formation. The incisor teeth were long and curved and provided with a persistent pulp. They are supposed to be related both to the rodents and ungulates. Called also Toxodontia.
Monodelphia :: Monodelphia (n. pl.) The group that includes all ordinary or placental mammals; the Placentalia. See Mammalia.
Mastology :: Mastology (n.) The natural history of Mammalia.
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