jackstone

[jak-stohn]
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noun

jackstones, (used with a singular verb) jack1(def 5c).

Origin of jackstone

1805–15; earlier chackstone, alteration of checkstone pebble, of uncertain origin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for jackstone

Historical Examples of jackstone