mammal

noun
mam·​mal | \ ˈma-məl How to pronounce mammal (audio) \

Definition of mammal

: 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

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Other Words from mammal

mammalian \ mə-​ˈmā-​lē-​ən How to pronounce mammalian (audio) , ma-​ \ adjective or noun
mammal-like \ ˈma-​məl-​ˌlīk How to pronounce mammal-like (audio) \ or less commonly mammallike adjective
mammal-like behavior mammallike reptiles

Examples of mammal in a Sentence

Human beings, dogs, and cats are all mammals.

Recent Examples on the Web

Until now, however, the technique has been used mostly on the molars of living mammals. The Economist, "Vegetarian crocodiles once roamed the world," 28 June 2019 As one may guess after learning of Tashi’s pregnancy length, rhinos have one of the longest gestation periods out of all mammals. Kelli Bender, PEOPLE.com, "Rhino Mom Endures 488-Day Pregnancy to Give Birth to 123-Pound Baby At Buffalo Zoo," 21 June 2019 The hall of mammals had sixteen permanent exhibits, which included buffalo, elk, white tail deer, raccoon, badger, red wolf, coyotes and many others. Dallas News, "Is the Dallas Museum of Natural History at Fair Park open to the public? Curious Texas investigates," 21 June 2019 Of all mammals exposed to droughts and tropical cyclones, primates have faced the bulk of them. Scottie Andrew And Saeed Ahmed, CNN, "Climate change threatens nearly 40% of the world's primates, study says," 17 June 2019 In 1874, the naturalist and whaling captain Charles Scammon wrote a classic work on marine mammals in the Pacific Northwest. Sallie Tisdale, Harper's magazine, "Catechism of the Waters," 10 June 2019 Savage led a team of 13 people from NOAA, the Alaska Department of Fish and Game, the University of Alaska and Stranding Network (a nonprofit that focuses on marine mammals who have washed ashore). Alex Mccarthy, The Seattle Times, "Find allows for third sperm whale necropsy ever in Alaska," 13 Apr. 2019 Learn about the hundreds of species of birds, reptiles, and mammals that inhabit this thriving ecosystem while exploring the winding trails of the refuge. National Geographic, "Wild Costa Rica Escape: Guanacaste’s Coral Reefs and Volcanic Peaks," 17 June 2019 Delegates heard that Angola’s Okavango Delta area is some of the world’s most important remaining wilderness, and the country has the potential to host one of the most diverse mammal populations on the continent. PEOPLE.com, "Prince Harry Follows in Mom Princess Diana's Footsteps by Advocating for Clearing Landmines," 17 June 2019

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.

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First Known Use of mammal

1813, in the meaning defined above

History and Etymology for mammal

from base of New Latin Mammalia (Linnaeus), class name, noun derivative from neuter plural of mammālis, from Latin mamma "breast, udder" + -ālis -al entry 1 — more at mamma

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Statistics for mammal

Last Updated

7 Jul 2019

Look-up Popularity

Time Traveler for mammal

The first known use of mammal was in 1813

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More Definitions for mammal

mammal

noun

English Language Learners Definition of mammal

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

mammal

noun
mam·​mal | \ ˈma-məl How to pronounce mammal (audio) \

Kids Definition of mammal

: 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

mammal

noun
mam·​mal | \ ˈmam-əl How to pronounce mammal (audio) \

Medical Definition of mammal

: any of the higher vertebrate animals comprising the class Mammalia

Other Words from mammal

mammalian \ mə-​ˈmā-​lē-​ən, ma-​ How to pronounce mammalian (audio) \ adjective or noun

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More from Merriam-Webster on mammal

Spanish Central: Translation of mammal

Nglish: Translation of mammal for Spanish Speakers

Britannica English: Translation of mammal for Arabic Speakers

Britannica.com: Encyclopedia article about mammal

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