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.
I'm on it
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A phrase used by an individual in a group suddenly determined to resolve a task or meaningless puzzle (that the others are too lazy to accomplish), usually in attempt to glorify their image or make them feel valuable to that group.
I'm on it meaning & definition 1 of I'm on it.
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