fluorescein

Definitions of fluorescein

1. noun

   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)
   synonyms: fluoresceine, fluorescent dye, resorcinolphthalein

   types:

   bromeosin, eosin

   a red fluorescent dye resulting from the action of bromine on fluorescein; used in cosmetics and as a biological stain for studying cell structures

   type of:

   absorption indicator

   an indicator used in reactions that involve precipitation

   dye, dyestuff

   a usually soluble substance for staining or coloring e.g. fabrics or hair