notochordal process

no·to·chor·dal pro·cess

in the embryo, a midline column of cells that are rostral to the primitive node and form the notochord.
See also: head process.
References in periodicals archive ?
The cleft created by ultimate separation of the prechordal plate and notochordal process is theorized to lead to a potentially sizeable skull base defect as noted in this patient [15].