Mammal vs. Rodent — What's the Difference?

Mammals (from Latin mamma, 'breast') are a group of vertebrate animals constituting the class Mammalia (), and characterized by the presence of mammary glands which in females produce milk for feeding (nursing) their young, a neocortex (a region of the brain), fur or hair, and three middle ear bones. These characteristics distinguish them from reptiles and birds, from which they diverged in the Carboniferous, over 300 million years ago.

Rodents (from Latin rodere, 'to gnaw') are mammals of the order Rodentia (), which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws. About 40% of all mammal species are rodents.

Any of various warm-blooded vertebrate animals of the class Mammalia, including humans, characterized by a covering of hair on the skin and, in the female, milk-producing mammary glands for nourishing the young.

Any of various mammals of the order Rodentia, such as a mouse, rat, squirrel, or beaver, characterized by large incisors used for gnawing or nibbling.

An animal of the class Mammalia, characterized by being warm-blooded, having hair and producing milk with which to feed its young.

A mammal of the order Rodentia, characterized by long incisors that grow continuously and are worn down by gnawing.

(paleontology) A vertebrate with three bones in the inner ear and one in the jaw.

A person lacking in maturity, social skills, technical competence or intelligence; lamer.

One of the Mammalia.

Gnawing; biting; corroding; applied to a destructive variety of cancer or ulcer.

Any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk

Gnawing; biting; corroding; (Med.) applied to a destructive variety of cancer or ulcer.

Gnawing.

One of the Rodentia.

Relatively small gnawing animals having a single pair of constantly growing incisor teeth specialized for gnawing