The Collaborative International Dictionary of English v.0.48:

Sandix \San"dix\, n. [L. sandix, sandyx, vermilion, or a color
   like vermilion, Gr. ?, ?.]
   A kind of minium, or red lead, made by calcining carbonate of
   lead, but inferior to true minium. [Written also sandyx.]
   [Obs.]
   [1913 Webster] sandlot

The Collaborative International Dictionary of English v.0.48:

Sandyx \San"dyx\, n. [L.]
   See Sandix.
   [1913 Webster]