turpeth noun. ['tǝ:pɪƟ] Also turbith. LME.
[medieval Latin turbit(h)um, turpetum, from Persian turbid from Sanskrit tripuā.]
1. A cathartic drug prepared from the root of a climbing plant of the Old World tropics, Operculina turpethum, of the bindweed family; the plant from which this is obtained. LME.

2. In full turpeth mineral. Mercurous sulphate, Hg₂SO₄, a toxic yellow crystalline powder formerly used as an emetic and purgative. E17.

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