Turpeth /(?)/

Tur·peth

Turpeth

n.
  1. The root of Ipomœa Turpethum, a plant of Ceylon, Malabar, and Australia, formerly used in medicine as a purgative; -- sometimes called vegetable turpeth. (Bot.)
  2. A heavy yellow powder, Hg3O2SO4, which consists of a basic mercuric sulphate; -- called also turpeth mineral. (Chem.)