VER'DITER, noun [verde-terre, green earth; terre-verde.] A preparation of copper sometimes used by painters, etc. for a blue, but more generally mixed with a yellow for a green color. It is a factitious substance of blue pigment, obtained by adding chalk or whiting to a solution of copper in nitric acid or aqua fortis.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI