German

Noun

Phenolphthalein n ‎(genitive Phenolphthaleins, no plural)

1. (organic chemistry) phenolphthalein

English

Noun

phenolphthalein ‎(countable and uncountable, plural phenolphthaleins)

1. (chemistry) A quinone derivative used as a pH indicator, and once used as a laxative

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