Tro"na (?), n. [Of Egyptian or North African origin.] (Chem. & Min.) A
native double salt, consisting of a combination of neutral and acid
sodium carbonate, Na2CO3.2HNaCO3. 2H2O, occurring as a white
crystalline fibrous deposit from certain soda brine springs and lakes;
— called also urao, and by the ancients nitrum.
Tron"age (?), n. [From Trone a steelyard.] A toll or duty paid for
weighing wool; also, the act of weighing wool. [Obs.] Nares.
Tro*na"tor (?), n. [LL. See Tronage.] An officer in London whose duty
was to weigh wool. [Obs.]
Trone (?), n. A throne. [Obs.] Chaucer.
Trone, n. [Cf. Prov. F. trogne a belly.] A small drain. [Obs. or Prov.
Eng.]
{ Trone (?), 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.
Troop (?), n. [F. troupe, OF. trope, trupe, LL. troppus; of uncertain
origin; cf. Icel. þorp a hamlet, village, G. dorf a village, dial. G.
dorf a meeting. Norw. torp a little farm, a crowd, E. thorp. Cf.
Troupe.] 1. A collection of people; a company; a number; a multitude.
That which should accompany old age — As honor, love, obedience, troops
of friends — I must not look to have.
Shak.