二头肌 Traditional form: 二頭肌 Pinyin (reading): èrtóujī Definitions: biceps muscle Characters: 二 - two; twice 头 - head; chief, boss; first, top 肌 - flesh, skin; muscle, tissue; meat on bones Traditional characters: 二 - two; twice 頭 - head; chief, boss; first, top 肌 - flesh, skin; muscle, tissue; meat on bones