airbrake

English Thesaurus

1. a vehicular brake that operates by compressed air; especially for heavy vehicles (noun.artifact)

hypernym	:	power brake,
definition	:	a brake on an automobile that magnifies a small force applied to the brake pedal into a proportionately larger force applied to slow or stop the vehicle (noun.artifact)

part meronym	:	automotive vehicle, motor vehicle,
definition	:	a self-propelled wheeled vehicle that does not run on rails (noun.artifact)

2. a small parachute or articulated flap to reduce the speed of an aircraft (noun.artifact)

hypernym	:	constraint, restraint,
definition	:	a device that retards something's motion (noun.artifact)