This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Resembling the metal copper, especially in color.

adj. Mixed with copper; containing copper, or made of copper; like copper.

Containing or resembling copper; having any quality of copper: as, a coppery solution; a coppery taste.

adj. of something having the color of copper

"Ginny was half a block away, her voluptuous bottom sheathed in coppery velvet."

chromatic   

blue-black    flaxen    auburn    reddish    red-gold    brassy    ashen    pearly    lustrous    tawny