Webster's English Dictionary

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glaucous

glau.cous \'glo.-k*s\ aj [L glaucus gleaming, gray, fr. Gk glaukos] 1a: of 
   a pale yellow green color  1b: of a light bluish gray or bluish white color 
    2: having a powdery or waxy coating that gives a frosted appearance and te 
   nds to rub off {~ fruits} - glau.cous.ness n