fluorophosphoric acid
noun
flu·o·ro·phos·phor·ic acid
| \ -ˌfäs-ˈfȯr-ik-
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Medical Definition of fluorophosphoric acid
: any of three acids made by reaction of the pentoxide of phosphorus with hydrogen fluoride
especially
: an acid H2PO3F obtained as a colorless viscous liquid and as salts and esters some of which are nerve gases