horsing-chainn. the chain that fastens a grinder's seat to the framework of the grindstone.
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society > occupation and work > equipment > work-benches, seats, etc. > [noun] > seat > for use while grinding > part of
horsing-chain1870
1870 C. ReadePut Yourself in his Place I. 201 The stone went like a pistol-shot, and snapped the horsing-chains like thread..the grinder..had fallen forward on his broken horsing.