noun
1. : a test to discover the amount of abrasive material present (as in a paste or powder detergent) or to discover the relative resistance of a surface to abrasive material
2. : a test for allergy in which scratches are made in the epithelial layer of the skin and the suspected allergen rubbed into the area and which determines a positive reaction by development of redness or a wheal around the scratched part — compare intracutaneous test , patch test