Part of the Body Removed in a Mastectomy
Puzzle 15 of Millennial Words Hard Pack
Question is: Part of the Body Removed in a Mastectomy
and the answer is: BREAST
Word Meaning:
BREAST — (anatomy) Either of the two organs on the front of a female human's chest, which contain the mammary glands; also the analogous organs in males.
Definitions from Wiktionary.