Main Entry:

ver·di·gris

Pronunciation:

\ˈvər-də-ˌgrēs, -ˌgris, -grəs also -ˌgrē\

Function:

noun

Etymology:

Middle English vertegrese, from Anglo-French verdegrece, vert de Grece, literally, green of Greece

Date:

14th century

1 a: a green or greenish-blue poisonous pigment resulting from the action of acetic acid on copper and consisting of one or more basic copper acetates b: normal copper acetate Cu(C₂H₃O₂)₂·H₂O2: a green or bluish deposit especially of copper carbonates formed on copper, brass, or bronze surfaces