What is "trone"

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

Trone \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.

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

Etymology 1 n. (context obsolete UK dialect English) A small drain. Etymology 2

n. 1 (context UK dialect English) A steelyard. 2 (context UK dialect Scotland obsolete English) 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.