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. [ 1913 Webster ]
{ } n. [ LL. trona, fr. L. trutina a balance; cf. Gr. &unr_;. ] 1. A steelyard. [ Prov. Eng. ] [ 1913 Webster ]
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. [ 1913 Webster ]
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. [ 1913 Webster ]
แสดงได้ทั้งความหมายของคำเดี่ยว และคำผสม ได้อย่างถูกต้อง
เช่น Secretary of State=รัฐมนตรีต่างประเทศของสหรัฐฯ (ในภาพตัวอย่าง),
High school=โรงเรียนมัธยมปลาย
