Definition of verdigris

exculpate Definition: (verb) to free from blame or guilt. Petersons.com

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< verdict

Verdigris >

ver·di·gris    (vûrd-grs, -grs, -gr) KEY  

NOUN:

1. A blue or green powder consisting of basic cupric acetate used as a paint pigment and fungicide.
2. A green patina or crust of copper sulfate or copper chloride formed on copper, brass, and bronze exposed to air or seawater for long periods of time.

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ETYMOLOGY:
Middle English vertegrez, from Old French verte grez, alteration of vert-de-Grice : verd, green ; see verdant + de, of (from Latin d; see de- ) + Grice Greece

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