A mill or facility where gray pigments, dyes, or materials are processed or produced.
Compound of 'gray' (from Old English 'græg', of Germanic origin) and 'mill' (from Old English 'myln', from Latin 'molina'). The term emerged in industrial contexts to describe specialized mills processing gray materials.
Historic mills often took on descriptor names based on what they processed—sawmills, gristmills, graymills—creating a whole vocabulary of industrial function that's nearly disappeared with the decline of manufacturing. You can still trace these names on old maps!
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