any vertebrate of the class Mammalia, having the body more or less covered with hair, nourishing the young with milk from the mammary glands, and, with the exception of the egg-laying monotremes, giving birth to live young.
Origin of mammal
1820–30; as singular of New Latin Mammalia neuter plural of Late Latin mammālis of the breast. See mamma2, -al1
Dellaire told me that while no marine mammals have been found yet infected with SARS-CoV-2, “…beluga whales and dolphins have been found to be infected by related gammacoronaviruses.”
Everything we know—and don’t know—about human-to-animal COVID transmission|jakemeth|September 4, 2020|Fortune
In some intriguing cases, that loss of genes isn’t known to cause disease symptoms in any other mammals.
By Losing Genes, Life Often Evolved More Complexity|Viviane Callier|September 1, 2020|Quanta Magazine
With 45 species of mammals and more than 200 species of birds from six continents, the refuge is more biodiverse than almost any area in the Arctic.
The Trump administration opened the Arctic National Wildlife Refuge to oil companies—but none may bite|By Scott L. Montgomery/The Conversation|August 26, 2020|Popular Science
A yellow-rumped leaf-eared mouse has shattered the world record as the highest-dwelling mammal yet documented.
A South American mouse is the world’s highest-dwelling mammal|Jack J. Lee|July 29, 2020|Science News
Many sleep discoveries first made in flies have been verified in mammals.
The term “gestation,” for instance, is derived from the Latin verb gestāre, used to describe a mammal carrying a burden.
The Artificial Womb Will Change Feminism Forever|Samantha Allen|August 12, 2014|DAILY BEAST
If you like mammal species from the suborder Vermilingua (meaning "worm tongue")...
The March Madness Teams to Cheer If Yours Got Bounced|Ben Teitelbaum|March 16, 2014|DAILY BEAST
The boy screamed a deep guttural scream that did not seem to belong to any mammal I knew of.
From Bullets to Ballet|Sebastian Rich|October 16, 2010|DAILY BEAST
But along with whales, their mammal cousins, dolphins may face more danger over the long term below the surface of the sea.
Are These Dolphins Doomed?|Eli Kintisch|May 7, 2010|DAILY BEAST
The pocket gopher, nesophilus, so far as known is the only mammal which has developed a subspecies endemic to the island.
The Pocket Gophers (Genus Thomomys) of Utah, Vol. 1 No. 1|Stephen D. Durrant
Yet, inside these wee bodies is as much machinery as it takes to run any other mammal—an elephant, say.
The Adventures of a Grain of Dust|Hallam Hawksworth
The next level of mammal life, the highest level that it attains in Australia (apart from recent invasions), is the Marsupial.
The Story of Evolution|Joseph McCabe
These primitive mammals help us to reconstruct the mammal life of the Mesozoic Epoch.
The Story of Evolution|Joseph McCabe
Spotty isn't a mammal, as are all of you and all those we have been learning about, but is a reptile.
The Burgess Animal Book for Children|Thornton W. Burgess
British Dictionary definitions for mammal
mammal
/ (ˈmæməl) /
noun
any animal of the Mammalia, a large class of warm-blooded vertebrates having mammary glands in the female, a thoracic diaphragm, and a four-chambered heart. The class includes the whales, carnivores, rodents, bats, primates, etc
Any of various warm-blooded vertebrate animals of the class Mammalia, whose young feed on milk that is produced by the mother's mammary glands. Unlike other vertebrates, mammals have a diaphragm that separates the heart and lungs from the other internal organs, red blood cells that lack a nucleus, and usually hair or fur. All mammals but the monotremes bear live young. Mammals include rodents, cats, dogs, ungulates, cetaceans, and apes.