transpyloric plane

[trăns′pī-lôrĭk, -pĭ-]
n.
  1. An Addison's clinical plane passing horizontally midway between the upper margins of the sternum and the pubic symphysis, corresponding to the disk between the first and second lumbar vertebrae.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.