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sprag

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(sprag)

noun

a roof prop used in a coal mine
☆ a device for preventing a vehicle from rolling backward on a grade

Origin: prob. < Scand, as in Dan sprag, twig < base of sprage, to crack, crackle: for IE base see spark

See sprag in American Heritage Dictionary 4

noun

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.
A prop to support a mine roof.

Origin:

Origin: Perhaps of Scandinavian origin

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