The first small mammals evolved from reptiles about 200 million years ago, and the group diversified rapidly after the extinction of the dinosaurs to become the dominant form of land animal, with about 4,000 living species. Mammals belong to the class Mammalia, which contains the subclass Prototheria (monotremes) and the infraclasses Metatheria (marsupials) and Eutheria (placental mammals such as rodents, cats, whales, bats, and humans)
- It provides the growing young with everything it wants, and only mammals produce milk.
- The domestic animal is the first mammal known to die of the disease in Europe.
- The male feeds the female while she incubates, catching small mammals and birds and bringing them back to the nest.
Early 19th century: anglicized form (first used in the plural) of modern Latin mammalia, neuter plural of Latin mammalis (adjective), from mamma 'breast' (see mamma2).
This is an anglicized form of modern Latin mammalia, from mamma ‘breast’, the ability to produce milk being one of the distinguishing features of mammals.
Words that rhyme with mammalcamel, enamel, entrammel, trammel
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