parachordal

[păr′ə-kôrdl]
adj.
  1. Alongside the anterior portion of the notochord in the embryo. Used of the cartilaginous bars on either side that enter into the formation of the base of the skull.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.