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Dictionary

phosphor'ic ac'id

Chem.
any of three acids, orthophosphoric acid, H₃PO₄, metaphosphoric acid, HPO₃, or pyrophosphoric acid, H₄P₂O₇, derived from phosphorus pentoxide, P₂O₅, and various amounts of water.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

phosphoric

phosphorism

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