The underjaw, also known as the mandible, is the lower jaw of a vertebrate animal. It's the bony structure that forms the lower part of the mouth and supports the lower teeth. The underjaw articulates with the upper jaw, enabling the animal to open and close its mouth for activities such as eating, vocalizing, and defense. Its shape, size, and strength are crucial for an animal's survival and adapted to its diet and lifestyle. It's often a target for injury in physical altercations.
Underjaw meaning with examples
- The paleontologist carefully examined the fossilized underjaw of the ancient hominid, noting its size and robustness. The sturdy bone structure hinted at a diet requiring significant chewing power and providing critical insights into the species' feeding habits, allowing the scientists to determine if they consumed plant or meat based meals.
- The boxer took a devastating uppercut, resulting in a fracture of his underjaw, sidelining him from competition. The impact of the blow proved too much for the bony structure, making his speech and eating difficult. The fighter's career hung in the balance as the bone healed.
- The canine's underjaw was powerfully built, allowing it to grip and tear at its prey with ease, making it an extremely efficient hunter. The strength of its jaws, and the teeth held within them, were testaments to its natural predatory adaptations, crucial for surviving in the wild.
- During the dental examination, the dentist palpated the patient's underjaw to check for any signs of temporomandibular joint (TMJ) dysfunction. The process involved careful handling and observing if the jaw clicks when opening or closing, signaling possible problems with the joint.
- In a display of aggression, the gorilla bared its teeth, displaying its massive underjaw to signal a threat and ward off any potential rivals. The prominent jaw size served as a warning, illustrating the animal's strength and dominance within its social group, used as a form of intimidation.