乳腺癌 rǔxiàn'ái breast cancer Origin Definitions Defs Strokes Stroke Words Sentences Sents 乳腺 rǔxiàn noun mammary gland mammary gland; the milk-secreting organ in humans and other mammals癌 ái noun cancer a malignant tumor formed by the abnormal and uncontrolled growth of cells; carcinoma.