mandibles is a form of:

Mandible



noun
1.
(A jaw either the parts of a birds beak, either of the biting jaws of an insect, either jaw of a beaked animal) ផ្នែកនីមួយៗនៃចំពុះបក្សី, ថ្គាមសត្វល្អិត human mandible ឆ្អឹងថ្គាមក្រោម, insect mandible ថ្គាម (សត្វល្អិត)
2.
(វេជ្ជសាស្ត្រ) ឆ្អឹងថ្គាមក្រោម
ENGLISH MEANING
noun
1.
The bone, or principal bone, of the lower jaw; the inferior maxilla; -- also applied to either the upper or the lower jaw in the beak of birds.
2.
The anterior pair of mouth organs of insects, crustaceaus, and related animals, whether adapted for biting or not.