. A family of vertebrate animals whose females in a state of nature suckle their young, but when civilized and enlightened put them out to nurse, or use the bottle.

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.

Clade of amniotes characterized by hair and mammary glands, among other traits. Descended from synapsid ancestors during the Late Triassic.

warm-blooded vertebrates characterized by mammary glands in the female

The class to which all mammals including primates belong. Mammals have hair and mammary glands and give birth to live young. (see classification)

refers to the Class to which mammals belong

The vertebrate class of mammals, characterized by body hair and mammary glands that produce milk to nourish the young. mantle A heavy fold of tissue in mollusks that drapes over the visceral mass and may secrete a shell. marine marini(us), from mare, the sea] Living in salt water.

The highest class of animals, including the ordinary hairy quadrupeds, the whales and man, and characterised by the production of living young which are nourished after birth by milk from the teats ( Mammæ, Mammary glands) of the mother. A striking difference in embryonic development has led to the division of this class into two great groups; in one of these, when the embryo has attained a certain stage, a vascular connection, called the placenta, is formed between the embryo and the mother; in the other this is wanting, and the young are produced in a very incomplete state. The former, including the greater part of the class, are called Placental mammals; the latter, or Aplacental mammals, include the Marsupials and Monotremes ( Ornithorhynchus). 116