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.
Undercoat
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A coat worn under another; a light coat, as
distinguished from an overcoat, or a greatcoat.
Undercoat meaning & definition 1 of Undercoat.
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A layer of paint applied after the primer and before the topcoat.
Undercoat meaning & definition 2 of Undercoat.
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a first layer of paint that is put on a surface in order to improve the appearance of the final one, or the paint used for this:
Undercoat meaning & definition 3 of Undercoat.
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