maxillary vs submaxilla

maxillary

noun
  • A tooth growing from the upper jawbone. 

adj
  • Of or relating to the jaw or jawbone. 

  • Of or pertaining to the maxillae of an arthropod. 

submaxilla

noun
  • The lower jawbone. 

How often have the words maxillary and submaxilla occurred in a corpus of books? (source: Google Ngram Viewer )