Dictionary![]() ![]() an'timony pen•ta•sul'fidePronunciation: (pen"tu-sul'fīd), [key] Chem. a deep-yellow, water-insoluble powder, Sb2S5, used chiefly as a pigment in oil and water colors. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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