n 1 a  :  JAW 1 : esp  :  JAW 1b  b  :  the lower jaw with its investing soft parts  2  :  any of various invertebrate mouthparts serving to hold or bite food materials : esp  :  either member of the anterior pair of mouth appendages of an arthropod often forming strong biting jaws .
 
 
 
Similar sounding terms:  man·dib·u·la 
 
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