The Collaborative International Dictionary
Prochordal
Prochordal \Pro*chor"dal\, a. [Pref. pro + chordal.] (Anat.) Situated in front of the notochord; -- applied especially to parts of the cartilaginous rudiments in the base of the skull.
Wiktionary
prochordal
a. (context anatomy English) Situated in front of the notochord; applied especially to parts of the cartilaginous rudiments in the base of the skull.