The Collaborative International Dictionary
Epichordal
Epichordal \Ep`i*chor"dal\, a. [Pref. epi- + chordal.] (Anat.) Upon or above the notochord; -- applied esp. to a vertebral column which develops upon the dorsal side of the notochord, as distinguished from a perichordal column, which develops around it.
Wiktionary
epichordal
a. (context anatomy English) Upon or above the notochord; applied especially to a vertebral column which develops upon the dorsal side of the notochord, as distinguished from a perichordal column, which develops around it.