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mammary

American  
[mam-uh-ree] / ˈmæm ə ri /

adjective

Anatomy, Zoology.
  1. of or relating to the mamma or breast.


mammary British  
/ ˈmæmərɪ /

adjective

  1. 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.

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

“The reason is because Holsteins produce more milk. So they have more volume for the virus to enjoy,” she said, noting research showing the virus’ affinity for mammary tissue.

From Los Angeles Times • Oct. 20, 2024

But a few kinds of mammals, like our elephantine friends and our fellow primates, have arrangements of mammary tissue on the chest.

From Slate • Aug. 13, 2024

Thus the mammary glands were still functioning at that date; they appeared well developed.

From The Barren Ground Caribou of Keewatin by Harper, Francis

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