a diphtheria immunity test in which diphtheria toxoid is injected intracutaneously, nonimmunity being indicated by an inflammation at the injection site.
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British Dictionary definitions for Schick test
med a skin test to determine immunity to diphtheria: a dilute diphtheria toxin is injected into the skin; within two or three days a red inflamed area will develop if no antibodies are present
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012