n.上颚；下颌骨；（昆虫等的）大颚
The lower mandible could not move backward. 下颌不能再向后运动。
The article reports 20 cases of recurrent ameloblastoma of the mandible. 本文报告20例下颌骨复发性造釉细胞瘤。
The patient has a radiolucent lesion below the molar teeth in the right mandible. 病人在右下颌的大臼齿，有一放射透过性的病变。
