Definition of sprag in English:

sprag

Syllabification: sprag
Pronunciation: /spraɡ
 
/

noun

1A simple brake on a vehicle, especially a stout stick or bar inserted between the spokes of a wheel to check its motion.
1.1A one-way clutch that keeps a vehicle from rolling backwards.
2 Mining A prop used to support a roof, wall, or seam.

Origin

mid 19th cent: of unknown origin.

Definition of sprag in:

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Word of the day anomalous
Pronunciation: əˈnämələs
adjective
deviating from what is standard, normal, or expected