Saundby's test

Saund·by's test

(sônd′bēz)
n.
A test for blood in the stool in which hydrogen peroxide solution is added to a mixture of a saturated benzidine solution and a small quantity of feces in a test tube; a persistent dark-blue color indicates the presence of blood.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.