Günzberg's test

[ güntsbərgz, -bĕrks′ ]

n.

A test for detecting hydrochloric acid utilizing phloroglucinol and vanillin, which produce a bright red color in the presence of the acid.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.