p-aminohippuric acid clearance

[pē′ə-mē′nō-hə-pyurĭk]
n.
  1. A test to determine renal plasma flow using p-aminohippuric acid which, if injected intravenously to achieve low plasma concentrations, is almost totally cleared by the kidneys.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.