mammal

noun
mam·​mal | \ ˈma-məl \

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

Keep scrolling for more

Other Words from mammal

mammalian \ mə-​ˈmā-​lē-​ən , ma-​ \ adjective or noun
mammal-like also 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

Another venomous mammal, the solenodon, evolved more than 70 million years ago and is still around on a couple of Caribbean islands. Gemma Tarlach, Discover Magazine, "20 Things You Didn't Know About ... Poison," 25 Sep. 2018 The topics are as follows: Turtles and tortoises, small mammals, snakes and lizards, farm animals, birds and wildlife. Courant Community, "Community News For The Wethersfield Edition," 10 July 2018 In California, another iconic mammal, the mountain lion, is also facing threats from development. Matt Simon, WIRED, "Can the Koala Genome Save the Species From Deforestation and Chlamydia?," 2 July 2018 So while there is not a lot of information on reward pathway activity in people during in-group versus out-group social situations, there are some tantalizing results from studies on other mammals. Leslie Henderson, Scientific American, "Why Our Brains See the World as "Us" versus "Them"," 22 June 2018 Giraffes are renowned for being the tallest land mammal, and the Masai subspecies can mature to 17 ft. Saryn Chorney, PEOPLE.com, "L.A. Zoo's New Baby Masai Giraffe Arrives Just in Time to Celebrate World Giraffe Day," 21 June 2018 The individual experiences, which come with a surcharge ranging from $45 to $85, focus on specific marine mammals, although one of the offerings, the Family Adventure Tour, is more broad-based. Lori Weisberg, sandiegouniontribune.com, "SeaWorld debuts up-close encounters with otters, seals, flamingos — for a charge," 20 June 2018 Typically, the snakes feed on mammals (up to the size of deer) and birds, but they've been seen eating more dangerous targets like alligators. National Geographic, "Python Swallows Woman Whole—What Experts Say About the Rare Attack," 18 June 2018 While coyotes usually prey on small mammals like mice, voles and rabbits, dogs are particularly at risk this time of year, according to Andrew Rutter, a wildlife biologist with the Lake County Forest Preserve District. Steve Sadin, chicagotribune.com, "Coyote kills pet chihuahua in backyard of Deerfield home," 11 May 2018

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.

See More

First Known Use of mammal

1813, in the meaning defined above

History and Etymology for mammal

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

Keep scrolling for more

Learn More about mammal

Statistics for mammal

Last Updated

14 Jan 2019

Look-up Popularity

Time Traveler for mammal

The first known use of mammal was in 1813

See more words from the same year

Keep scrolling for more

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 \

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 \

Medical Definition of mammal

: any of the higher vertebrate animals comprising the class Mammalia

Other Words from mammal

mammalian \ mə-​ˈmā-​lē-​ən, ma-​ \ adjective or noun

Keep scrolling for more

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

Comments on mammal

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

WORD OF THE DAY

to gather or build up little by little

Get Word of the Day daily email!

Test Your Vocabulary

Homophone Quiz

  • three-bears-two-of-them-look-like-theyre-whispering-to-a-third-bear-who-looks-chuffed-to-be-the-center-of-attention
  • In order to judge how people felt, the senator's office hired a firm to take a ______.
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
SCRABBLE® Sprint

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!