from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A brake, especially on a motor vehicle, that is operated by compressed air.
- noun A surface, such as an aileron, that can be projected into the airflow in order to decrease the airspeed of an airplane by increasing drag; a spoiler.
from the GNU version of the Collaborative International Dictionary of English.
- (Mach.) A railway brake powered by compressed air.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Alternative spelling of
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