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postcostal anastomosis

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