An acid-base indicator which is colorless in acid solution, but turns pink to red as the solution becomes alkaline. It is used medicinally as a cathartic.
Jew's-harp
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An instrument of music, which, when placed between the
teeth, gives, by means of a bent metal tongue struck by the finger, a
sound which is modulated by the breath; -- called also Jews-trump.
Jew's-harp meaning & definition 1 of Jew's-harp.
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