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.
Fireball
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A ball filled with powder or other combustibles, intended
to be thrown among enemies, and to injure by explosion; also, to set
fire to their works and light them up, so that movements may be seen.
Fireball meaning & definition 1 of Fireball.
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a large ball of fire, especially one caused by a very powerful explosion:
Fireball meaning & definition 2 of Fireball.
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