Delbet's sign

[dĕl-bāz]
n.
  1. An indication of aneurysm of a main artery in which the pulse disappears although collateral circulation remains efficient and nutrition of the part below the main artery is well maintained.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.