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1 the mammary gland of a woman: one of two compound glands that produce milk. Each breast consists of glandular lobules – the milk-secreting areas – embedded in fatty tissue. The milk passes from the lobules into lactiferous ducts, each of which discharges through a separate orifice in the nipple. See also lactation. Anatomical name: mamma.

2 the front part of the chest (thorax).

Longitudinal section through a breast

Subjects: Plastic and Reconstructive Surgery.

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