postcostal anastomosis

[pōst-kŏstl]
n.
  1. The longitudinal connection of the seven intersegmental arteries in an embryo that gives rise to the vertebral artery.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.