What is "deicing boot"

n. (context aviation English) a device installed on aircraft surfaces to permit a mechanical deicing in flight

A deicing boot is a type of ice protection system installed on aircraft surfaces to permit a mechanical deicing in flight. Such boots are generally installed on the leading edges of wings and control surfaces (e.g. horizontal and vertical stabilizer) as these areas are most likely to accumulate ice and any contamination could severely affect the aircraft's performance.

Deicing boots were invented by the B.F. Goodrich Corporation in 1923 in Akron, Ohio. In its quest to develop deicing boots, the company built a large indoor facility in Akron to replicate bad weather and icing on aircraft wings.