1 the lower of the two bones in your face that contain your teeth 下颌骨 [SYN]A less technical word is jawbone. 非专门的用语为jawbone。 ☞picture at body 见body插图

2 either of the two parts that are at the front and on either side of an insect's mouth, used especially for biting and crushing food （昆虫的）上颚，大颚（尤用于咬或嚼食物） ☞picture at insect 见insect插图