n. [ Of Egyptian or North African origin. ] (Chem. & Min.) A native double salt, consisting of a combination of neutral and acid sodium carbonate,
n. [ From Trone a steelyard. ] A toll or duty paid for weighing wool; also, the act of weighing wool. [ Obs. ] Nares. [ 1913 Webster ]
n. [ LL. See Tronage. ] An officer in London whose duty was to weigh wool. [ Obs. ] [ 1913 Webster ]