starch-iodine test

starch-i·o·dine test

a test for sweating in which iodine in oil is painted on the skin, followed by dusting with a starch powder which turns blue-black in the presence of iodine and moisture.

starch-iodine test

A test for the presence of starch. When an iodine solution is applied to a substance or material that contains starch, a dark blue color appears.