Mammal

/ˈmæm.əl/

Meaning & Definition

noun

A warm-blooded vertebrate animal characterized by the presence of mammary glands which in females produce milk for feeding their young, a body covered in hair or fur, and three middle ear bones.

The blue whale is the largest mammal in the ocean.

Any member of the class Mammalia, which includes humans, dogs, cats, and elephants, among others.

Bats are the only flying mammals.

A type of animal that gives live birth (with the exception of monotremes), typically has hair or fur, and is distinguished from birds, reptiles, amphibians, and fish.

Humans belong to the group of mammals.

An animal that is characterized by nurturing its young with milk and possessing specialized teeth and a complex nervous system.

The domestic cat is a common mammal kept as a pet.

Etymology

From Latin 'mammalis' meaning 'of the breast', from 'mamma' meaning 'breast'.

Common Phrases and Expressions

mammal behavior

Refers to typical actions or habits of mammals.

marine mammals

Aquatic mammals such as whales, dolphins, and seals.

placental mammal

A group of mammals that carry young in a uterus until ready to be born.

Related Words

mammary

Pertaining to the mammary glands that produce milk.

placenta

An organ that develops in the uterus during pregnancy in placental mammals.

fur

The short, fine hair that covers the bodies of many mammals.

Slang Meanings

Used affectionately to refer to a mother or caretaker.

She's such a great mammal to her kids.

A term sometimes used in casual contexts to refer to an animal lover.

He's a real mammal guy, always rescuing wildlife.