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
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| APA | WordNet. (2010). fluorescein. Retrieved September 21, 2026, from http://smartdefine.org/fluorescein/definitions/1249209 |
| Chicago | WordNet. 2010. "fluorescein" http://smartdefine.org/fluorescein/definitions/1249209 (accessed September 21, 2026). |
| Harvard | WordNet 2010, fluorescein, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/fluorescein/definitions/1249209>. |
| MLA | WordNet. "fluorescein" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/fluorescein/definitions/1249209> |