“颚”的拼音？

他跌倒时,前颚撞在了道路的边石上.He hit his forehead against kerb when he fell.而且他的面孔光润, 颚骨下陷.And then his face was smooth , with a receding jaw.牙痛使我整个颚都痛起来了.A too thacke racked my jaw....

“颚”的英语可以翻译为：jaw，chap，mandible ...