三角肌 Traditional form: 三角肌 Pinyin (reading): sānjiǎojī Definitions: deltoid muscle (over the shoulder) Characters: 三 - three 角 - angle, corner; horn, horn-shaped 肌 - flesh, skin; muscle, tissue; meat on bones Traditional characters: 三 - three 角 - angle, corner; horn, horn-shaped 肌 - flesh, skin; muscle, tissue; meat on bones