noun, plural mas·tec·to·mies. Surgery.
- the operation of removing all or part of the breast or mamma.
noun plural -mies
- the surgical removal of a breast
n.surgical removal of a breast, 1909, from Greek mastos “woman’s breast” (see masto-) + -ectomy. n.
- Surgical removal of all or part of a breast, sometimes including excision of the underlying pectoral muscles and regional lymph nodes, usually performed as a treatment for cancer.mammectomy
- Surgical removal of all or part of a breast, performed as a treatment for cancer.♦ A radical mastectomy includes excision of the underlying pectoral muscles and regional lymph nodes.
The surgical removal of a breast.