\Trone\, n.
A throne. [Obs.] --Chaucer.

\Trone\, n. [Cf. Prov. F. trogne a belly.]
A small drain. [Obs. or Prov. Eng.]

\Trone\, Trones \Trones\, n. [LL. trona, fr. L. trutina a
balance; cf. Gr. ?.]
1. A steelyard. [Prov. Eng.]
2. A form of weighing machine for heavy wares, consisting of
   two horizontal bars crossing each other, beaked at the
   extremities, and supported by a wooden pillar. It is now
   mostly disused. [Scot.] --Jamieson.
{Trone stone}, a weight equivalent to nineteen and a half
   pounds. [Scot.]
{Trone weight}, a weight formerly used in Scotland, in which
   a pound varied from 21 to 28 ounces avoirdupois.