phthalein

noun

: any of various xanthene dyes (as phenolphthalein or fluorescein) that are intensely colored in alkaline solution

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Cite this Entry

“Phthalein.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/phthalein. Accessed 4 Oct. 2024.

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