(n) a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed), Syn.resorcinolphthalein, fluoresceine, fluorescent dye
(n) lamp consisting of a tube coated on the inside with a fluorescent material; mercury vapor in the tube emits ultraviolet radiation that is converted to visible radiation by the fluorescent material
The Collaborative International Dictionary of English (GCIDE) v.0.53
a. [ Fluo- boric: cf. F. fluoborique. ] (Chem.) Pertaining to, derived from, or consisting of, fluorine and boron. [ 1913 Webster ]
Fluoridic acid (Chem.), a double fluoride, consisting essentially of a solution of boron fluoride, in hydrofluoric acid. It has strong acid properties, and is the type of the borofluorides. Called also borofluoric acid. [ 1913 Webster ]
{ , n. [ Fluo- + cerium. ] (Min.) A fluoride of cerium, occuring near Fahlun in Sweden. Tynosite, from Colorado, is probably the same mineral. [ 1913 Webster ]
n. [ Fluorene + anthracene. ] (Chem.) A white crystalline hydrocarbon C15H10, of a complex structure, found as one ingredient of the higher boiling portion of coal tar. [ 1913 Webster ]
แสดงได้ทั้งความหมายของคำเดี่ยว และคำผสม ได้อย่างถูกต้อง
เช่น Secretary of State=รัฐมนตรีต่างประเทศของสหรัฐฯ (ในภาพตัวอย่าง),
High school=โรงเรียนมัธยมปลาย
