mammal

play
noun mam·mal \ˈma-məl\

Definition of mammal

  1. :  any of a class (Mammalia) of warm-blooded higher vertebrates (such as placentals, marsupials, or monotremes) that nourish their young with milk secreted by mammary glands, have the skin usually more or less covered with hair, and include humans

mammalian

play \mə-ˈmā-lē-ən, ma-\ adjective or noun

Examples of mammal in a Sentence

  1. Human beings, dogs, and cats are all mammals.

Recent Examples of mammal from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mammal'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of mammal

New Latin Mammalia, from Late Latin, neuter plural of mammalis of the breast, from Latin mamma breast

Other Mammals Terms


MAMMAL Defined for English Language Learners

mammal

play
noun

Definition of mammal for English Language Learners

  • : a type of animal that feeds milk to its young and that usually has hair or fur covering most of its skin


MAMMAL Defined for Kids

mammal

play
noun mam·mal \ˈma-məl\

Definition of mammal for Students

  1. :  a warm-blooded animal (as a dog, mouse, bear, whale, or human being) with a backbone that feeds its young with milk produced by the mother and has skin usually more or less covered with hair


Medical Dictionary

mammal

play
noun mam·mal \ˈmam-əl\

Medical Definition of mammal

  1. :  any of the higher vertebrate animals comprising the class Mammalia

mammalian

\mə-ˈmā-lē-ən, ma-\play adjective or noun


Seen and Heard

What made you want to look up mammal? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

marked by lack of plan or order

Get Word of the Day daily email!

Test Your Vocabulary

The Emoji Quiz

  • emoji-the-quiz
  • What phase of the moon is this: 🌖 ?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!