1 of 2


: situated behind the frontal bone or frontal region of the skull or in reptiles the frontal shield
specifically : indicating a bone behind and above the orbit of which it commonly forms part of the border that is present in many vertebrates and corresponds to the postorbital process of the frontal bone of various birds and mammals


2 of 2


: a postfrontal part (as a bone or scale)
specifically : the sphenotic bone of a fish

Word History



post- + frontal

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Dictionary Entries Near postfrontal

Cite this Entry

“Postfrontal.” Dictionary, Merriam-Webster, Accessed 4 Mar. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!