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gallet

American  
[gal-it] / ˈgæl ɪt /
Or galet,

noun

  1. spall.


verb (used with object)

  1. to fill (a mortar joint) with gallets.

Etymology

Origin of gallet

1705–15; < French galet pebble, Old French galet, jalet, derivative of Old North French gal pebble (said to be < Celtic, but MIr gall “pillar stone, standing stone” is only point of comparison)