mam·​ma·​ry | \ ˈma-mə-rē How to pronounce mammary (audio) \

Definition of mammary

: of, relating to, lying near, or affecting the mammae

Examples of mammary in a Sentence

Recent Examples on the Web Breast milk is produced by the mammary glands in response to different hormones circulating in a woman's body during the final months of pregnancy. Miriam Fauzia, USA TODAY, 31 Aug. 2021 Female dogs that are never spayed or that are spayed after their first heat are also at higher risk for mammary cancer. Washington Post, 21 Aug. 2020 The company collects mammary epithelial cells while a person is expecting. Gear Team, Wired, 13 Jan. 2021 In the coming weeks, the blind, hairless cub—which is roughly 1/900th the size of its mother—will live on Mei Xiang’s chest, migrating between mammary glands and warm armpits. Alex Fox, Smithsonian Magazine, 21 Aug. 2020 Newborn European rabbit pups respond to a mammary pheromone released from glands around the mother’s nipples that enables them to quickly find the nipples and nurse. Liz Langley, National Geographic, 19 May 2020 Growing enough mammary cells to make any milk at scale is also a huge technical challenge. Sarah Zhang, The Atlantic, 27 Feb. 2020 Ariel had been diagnosed with mammary tumors that were removed and biopsied. Arizona Republic, azcentral, 6 Mar. 2020 Noam was diagnosed with mammary cancer in August after zoo staff noticed a mass growing on her abdomen. Robin Goist, cleveland, 8 Nov. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mammary.' 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 mammary

1615, in the meaning defined above

History and Etymology for mammary

borrowed from New Latin mammārius, from Latin mamma "breast, udder" + -ārius -ary entry 2 — more at mamma

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Time Traveler for mammary

Time Traveler

The first known use of mammary was in 1615

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Dictionary Entries Near mammary

Mamma mia


mammary gland

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Statistics for mammary

Cite this Entry

“Mammary.” Dictionary, Merriam-Webster, Accessed 24 Jan. 2022.

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More Definitions for mammary



English Language Learners Definition of mammary

: of or relating to the breasts


mam·​ma·​ry | \ ˈmam-ə-rē How to pronounce mammary (audio) \

Medical Definition of mammary

 (Entry 1 of 2)

: of, relating to, lying near, or affecting the mammae


plural mammaries

Medical Definition of mammary (Entry 2 of 2)

More from Merriam-Webster on mammary

Nglish: Translation of mammary for Spanish Speakers

Britannica English: Translation of mammary for Arabic Speakers


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