ice-accretion indicator

ice-accretion indicator

[′īs ə‚krē·shən ‚ind·ə‚kād·ər]
(engineering)
An instrument used to detect the occurrence of freezing precipitation, usually consisting of a strip of sheet aluminum about 1½ inches (4 centimeters) wide, and is exposed horizontally, face up, in the free air a few meters above the ground.