名詞 fluorescein:

1. 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)
   同義詞：fluoresceine, fluorescent dye, resorcinolphthalein

fluo.res.ce.in

n.（名詞）
An orange-red compound, C20H 2O 5, that exhibits intense fluorescence in alkaline solution and is used in medicine, in oceanography, and as a textile dye.
熒光素：一種在堿性溶液里發(fā)出強(qiáng)烈熒光的桔紅色化合物，C20H 2O 5，用于醫(yī)藥、海洋學(xué)和作為紡織染料