bridle hand

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noun

(of a horseback rider) the hand, usually the left hand, that holds both reins or both pairs of reins, leaving the other hand free to manage a whip, crop, lariat, or the like.

Origin of bridle hand

First recorded in 1570–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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