from
The Collaborative International Dictionary of English v.0.48
Verditer \Ver"di*ter\, n. [F. vert-de-terre, literally, green of
earth.] (Chem.)
(a) Verdigris. [Obs.]
(b) 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.
[1913 Webster]
{Verditer blue}, a pale greenish blue color, like that of the
pigment verditer.
[1913 Webster]