man·di·ble
noun/ˈmændɪbl/
/ˈmændɪbl/
(anatomy)- the jawbone
enlarge image下颌骨 - the upper or lower part of a bird’s beak
鸟的上喙（或下喙） - either of the two parts that are at the front and on either side of an insect’s mouth, used especially for biting and crushing food
enlarge image（昆虫的）上颚
Word Originlate Middle English: from Old French, or from late Latin mandibula, from mandere ‘to chew’.