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.
Opening
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The act or process of opening; a beginning; commencement;
first appearance; as, the opening of a speech.
Opening meaning & definition 1 of Opening.
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[Bizarre] slang [for a girls] [private parts].
Opening meaning & definition 2 of Opening.
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An aperture or gap, especially one allowing access.
Opening meaning & definition 3 of Opening.
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