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The Clue

Invention of 1868 (8 letter answer)

The Answer

AIRBRAKE

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Notes

The answer AIRBRAKE is so rare that it appears less than once every 2500 puzzles.

Related Clues

Westinghouse's invention: 1868
Mechanical device that operates by compression

Definition

AIRBRAKE as a noun:

1. (airbrake, dive brake) = a small parachute or articulated flap to reduce the speed of an aircraft
2. a vehicular brake that operates by compressed air; especially for heavy vehicles