Meanings
- uncountableFluorescein.
Synonyms & antonyms
nouna 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)
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
- Ancient Greekῥητῑ́νη (rhētī́nē)
- Latinrēsīna
- Old Frenchrésine
- Middle Englishresyn
- Englishresin
- Proto-Indo-European*h₂ew-
- Proto-Indo-European*h₂ṓws
- Proto-Italic*ausis
- Latinauris
- Latinauricula
- Latinōricula
- Italianoricello
- Arabic[script needed] ('urjālla)influ.
- Old Catalanorxella
- Old Frenchorchel
- Frenchorseille
- Dutchorseille
- New Latinorcina
- Frenchorcine
- Englishorcin
- Akkadian𒎎𒋆𒁉𒍣𒁕 (guḫlum)
- Aramaicכוחלא (kuḥlā)
- Arabicكُحْل (kuḥl)
- Andalusian Arabicكُحُول (kuḥūl)
- Medieval Latinalcoho
- Middle Englishalcofol
- Englishalcohol
- Englishorcinol
- Englishresorcinol
- Englishphthalein
- Englishresorcinolphthalein
From resorcinol + phthalein.
Full word history & related roots →Cite this entry
resorcinolphthalein. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/resorcinolphthalein
“resorcinolphthalein.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/resorcinolphthalein. Accessed November 4, 2026.
WatkinsX Dictionary, s.v. “resorcinolphthalein,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/resorcinolphthalein.
Source: resorcinolphthalein on Wiktionary, CC BY-SA 4.0.