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The Collaborative International Dictionary
Verditer

Verditer \Ver"di*ter\, n. [F. vert-de-terre, literally, green of earth.] (Chem.)

  1. Verdigris. [Obs.]

  2. Either one of two pigments (called blue verditer, and green verditer) which are made by treating copper nitrate with calcium carbonate (in the form of lime, whiting, chalk, etc.) They consist of hydrated copper carbonates analogous to the minerals azurite and malachite.

    Verditer blue, a pale greenish blue color, like that of the pigment verditer.

Wiktionary
verditer

n. 1 (context obsolete English) verdigris 2 (context obsolete English) Either of two pigments (blue verditer and green verditer) made by treating copper nitrate with calcium carbonate.