• (a.) Situated in front of the notochord; -- applied especially to parts of the cartilaginous rudiments in the base of the skull.
Pro·chor'dal adjective [ Prefix pro + chordal .] (Anat.) Situated in front of the notochord; -- applied especially to parts of the cartilaginous rudiments in the base of the skull. 
Type: Term Pronunciation: prō-kōr′dăl Synonyms: prechordal