1. the lower jaws of an animal or person
Usage: plural form

Examples

• The shark’s powerful underjaws contained rows of sharp teeth.
• The fossil showed well-preserved underjaws from an ancient predator.
• The veterinarian examined the dog’s underjaws for signs of injury.
• The underjaws of the crocodile snapped shut with tremendous force.
• Paleontologists studied the underjaws to determine the creature’s diet.
• The underjaws were fractured in the accident and required surgery.