1. Education

verdigris

From , former About.com Guide

Statue of Liberty, top view

The Statue of Liberty (top view) displaying massive amounts of verdigris.

Image courtesy of the U.S. National Park Service
Definition:

(noun) - Verdigris is a green or bluish-green pigment. Its name comes from the Old French vert de Grece, which literally means "green of Greece." It was used as the primary green pigment up until around the 18th century. Think of the way copper changes color, as with an old penny - that weird looking green stuff is verdigris. (By the way, verdigris is a poisonous chemical compound. If you come across a small child attempting to insert such a penny into a nostril, you may consider frightening him or her into sensibility with that "poisonous" part.)

Pronunciation: vird·uh·gree
Also Known As: vert-de-gris, verderame, grünspan, copper acetate

©2013 About.com. All rights reserved.