sprag

sprag  (sprg)

n.

1.

a. A piece of wood or metal wedged beneath a wheel or between spokes to keep a vehicle from rolling.

b. A pointed stake lowered at an angle into the ground from a vehicle to prevent movement.

2. A prop to support a mine roof.

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[Perhaps of Scandinavian origin.]

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sprag [spræg]

n

1. (Engineering / Automotive Engineering) a chock or steel bar used to prevent a vehicle from running backwards on an incline

2. (Mining & Quarrying) a support or post used in mining

3. (Mining & Quarrying) NZ mining a steel bar inserted into the wheels of a box to act as a brake

[of uncertain origin]

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A projection preventing the movement of platforms or pallets in the side guidance rails in an aircraft cabin.

Thesaurus

Noun	1.	sprag - a chock or bar wedged under a wheel or between the spokes to prevent a vehicle from rolling down an incline chock, wedge - a block of wood used to prevent the sliding or rolling of a heavy object
	2.	sprag - a wooden prop used to support the roof of a mine pitprop prop - a support placed beneath or against something to keep it from shaking or falling