Definition of mammary adjective from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈmæməri//
; NAmE NAmE//ˈmæməri//
[only before noun](biology)
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connected with the breasts mammary glands (= parts of the breast that produce milk) Word Origin late 17th cent.: from mamma, the milk-secreting organ of female mammals + -ary.
See the Oxford Advanced American Dictionary entry: mammary