Dictionary![]() ![]() potas'sium phos'phateChem. any of the three orthophosphates of potassium (potassium monophosphate (K2HPO4), potassium diphosphate (KH2PO4), and tripotassium phosphate (K3PO4) ). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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