| NOUN | substance | resorcinolphthalein, fluorescein, fluoresceine, fluorescent dye | a yellow dye that is visible even when highly diluted |
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| Meaning | 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 / chloride ions are left in solution and negative fluorescein ions are then absorbed). | |
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| Synonyms | fluorescein, fluoresceine, fluorescent dye | |
| Category | solution | A homogeneous mixture of two or more substances |
| Narrower | eosin, bromeosin | A red fluorescent dye resulting from the action of bromine on fluorescein |
| Broader | 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 | |
| Spanish | colorante fluorescente, fluoresceína | |
| Catalan | fluoresceïna | |
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