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|(Chem.)||the compound called potassium permanganate, a dark violet, crystalline substance, KMnO4, which in formation passes through a peculiar succession of color from green to blue, purple, red, etc. See Potassium permanganate, under Potassium.|
See also: Chameleon
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.