py·ro·phos·phor·ic acid 
(pī′rō-fŏs-fôrĭk)
(pī′rō-fŏs-fôrĭk)n.
A glacial or syrupy viscous liquid, H4P2O7, used as a catalyst and in organic chemical manufacture.
- Charles William
- Charles William
- Charles X
- Charles XIV John
- Charles Édouard Jeanneret.
- Charley
- charley horse
- "Charlie."
- Charlie
- "Charlie."
- Charlie
- charlock
- charlotte
- Charlotte
- Charlotte
- Charlotte
- Charlotte Amalie
- Charlotte Anna Perkins
- charlotte russe
- Charlottesville
- Charlottetown
- charm
- charmed
- charmed lambda baryon
- charmed omega baryon