mammary

adj. of or pertaining to the mamma or breast; of or pertainign to the udder

n. (Informal) breast

Mammary glands are the organs that, in the female mammal, produce milk for the sustenance of the young. These exocrine glands are enlarged and modified sweat glands and are the characteristic of mammals which gave the class its name.
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Mammary /mam·ma·ry/ pertaining to the mammary gland, or breast. mam·ma·ry adj. Of or relating to a breast or mamma. [more]Mammary - Community and Resources

Adjective
1. of or relating to the milk-giving gland of the female
(pertainym) mammary gland, mamma

(a.)
Of or pertaining to the mammae or breasts; as, the mammary arteries and veins.