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a dimer of phosphoric acid, H4P2O7.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
py·ro·phos·phor·ic ac·id(pī'rō-fos-fōr'ik as'id),
An anhydride of phosphoric acid obtained by heating phosphoric acid to 213°C; it forms pyrophosphates with bases, and its esters are important in energy metabolism and in biosynthesis.
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