放射線 fàngshèxiàn radioactive rays Origin Definitions Defs Strokes Stroke Words Sentences Sents 放射线治疗 fàngshèxiànzhìliáo radiotherapy Treatment of disease, especially malignant tumors, using radiation from radioactive substances; radiation therapy.放射线疗法 fàngshèxiànliáofǎ radiotherapy treatment of disease using ionizing radiation; radiotherapy; irradiation therapy