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.
Dog days
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A period of from four to six weeks, in the summer, variouslyplaced by almanac makers between the early part of July and the earlypart of September; canicular days; -- so called in reference to therising in ancient times of the Dog Star (Sirius) with the sun.Popularly, the sultry, close part of the summer.
Dog days meaning & definition 1 of Dog days.
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the hottest days of the summer
Dog days meaning & definition 2 of Dog days.
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