chinn. 下巴、頦學術名詞頦:動物學、醫學、獸醫學頤:動物學、魚類、獸醫學機頭下部:航空太空、機械工程下巴:動物學、醫學禁:舞蹈英文釋義the protruding part of the lower jawraise oneself while hanging from one's hands until one's chin is level with the support bar