The mandible is the lower jawbone. Its primary function is chewing but it also serves to protect important structures in the face and neck. The mandible can be fractured or dislocated, and misalignment can lead to other medical conditions such as sleep apnea and temporomandibular joint disorders. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.