noun Medicine/Medical.
- a diphtheria immunity test in which diphtheria toxoid is injected intracutaneously, nonimmunity being indicated by an inflammation at the injection site.
noun
- 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
n.
- An intracutaneous test for detecting immunity or susceptibility to diphtheria.