Prochordal

1. a. Situated in front of the notochord; — applied especially to parts of the cartilaginous rudiments in the base of the skull.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.