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pyrometer
pyromorphite
pyrone
pyronine
pyrope
pyrophobia
pyrophoric
pyrophosphate
pyrophosphoric acid
pyrophotometer
pyrophyllite
pyrosis
pyrostat
pyrotechnic
pyrotechnics
pyroxene
pyroxenite
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pyrophosphoric acid
py·ro·phos·phor·ic ac·id [ prō foss fàwrik ássid ]


noun 
Definition:
 
viscous liquid used as catalyst: a viscous liquid formed when phosphoric acid is heated and loses a water molecule. Use: catalyst. H4P2O7
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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