mammary

American

[mam-uh-ree] / ˈmæm ə ri /

adjective

Anatomy, Zoology.

of or relating to the mamma or breast.

mammary British

/ ˈmæmərɪ /

adjective

of, relating to, or like a mamma or breast

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of mammary

First recorded in 1675–85; mamm(a) ² + -ary

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

mammary

Among the most important findings were mutations linked to aggressive mammary cancers in cats.

From Science Daily ● May 24, 2026

Beyond mammary cancer, the researchers identified similarities to human cancer mutations in tumors affecting the blood, bone, lungs, skin, gastrointestinal system, and central nervous system.

From Science Daily ● Mar. 18, 2026

The EU has already defined dairy items as products coming from the "normal mammary secretion".

From BBC ● Oct. 8, 2025

These babies even share the mighty boob: breaking a "rule" of mammal biology, naked mole rats do not have just around half as many babies as they have mammary glands.

From Salon ● May 11, 2025

Not less than sixty-five to seventy-five per cent of all cancers in women occur in atrophying organs, the uterus and mammary glands.

From Preventable Diseases by Woods Hutchinson

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023