Turpeth

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

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.