lower jaw lo·wer·jaw uncommon noun 1. the lower jawbone in vertebrates; it is hinged to open the mouth Synonymslower jawmandiblemandibulamandibular bonesubmaxillalower jawbonejawbonejowl Related words Word family lower jawbone Broader terms jawarticulator Narrower terms lantern jaw Part of gnathiongonionmandibular notchpogonionsymphysioncondylar processcoronoid process of the mandible WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
