What does "deicer" mean?

A chemical substance used to melt ice or snow deposited on roads, vehicles or other surfaces.

Deicer

Common synonyms include: de-icing chemical, defroster, deicing, deicing system, ice melt, ice remover.

/ˌdiˈaɪsɚ/ noun

noun ·Rare ·Advanced level

Noun

1
A chemical substance used to melt ice or snow deposited on roads, vehicles or other surfaces.
2
heater that removes ice or frost (as from a windshield or a refrigerator or the wings of an airplane) wordnet

From deice + -er.