Turpeth
Turpeth , noun
[New Latin turpethum, from Per. tirbid a cathartic, turbad a purgative root. Compare Turbith.]
1.
(Botany) The root of Ipomoa Turpethum, a plant of Ceylon, Malabar, and Australia, formerly used in medicine as a purgative; -- sometimes called vegetable turpeth.
2.
(Chemistry) A heavy yellow powder, Hg3O2SO4, which consists of a basic mercuric sulphate; -- called also turpeth mineral.