— verdigrisy , adj.
/verr"di grees', -gris/ , n.
a green or bluish patina formed on copper, brass, or bronze surfaces exposed to the atmosphere for long periods of time, consisting principally of basic copper sulfate. Also called aerugo .
[ 1250-1300; vert de gris; r. ME vertegrez vert de Grece, OF vere grez green of Greece ]