a blue-green pigment made from copper and used by painters, etc
verditer in American English
(ˈvɜrdɪtər)
noun
either of two basic copper carbonate pigments, the one (blue verditer) usually consisting of ground azurite, the other (green verditer) ground malachite
Word origin
MFr verd de terre, lit., green of the earth < OFr verte + L terra: see vert1 & terra