crux pilorum

crux pi·lo·rum

(pī-lôr′əm)
n.
A crosslike figure formed by hairs growing from two directions that meet and then separate in a direction perpendicular to the original orientation.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.