noun
de-icing agent; de-icer
Technical term for a substance used to melt ice, especially on roads or aircraft.
冬の道路には解氷剤がまかれる。
De-icing agents are spread on roads in winter.
飛行機の翼に解氷剤を散布する。
They spray de-icer on the airplane wings.
凍結防止剤 prevents freezing, whereas 解氷剤 removes existing ice.
Compound of 解氷 (de-icing) + 剤 (agent). The exact historical derivation is uncertain, but the components are transparent.