| pyro- or pyr- pref. 1. Fire; heat: pyrotechnic. 2. Relating to the action of fire or heat: pyrography. 3. Fever: pyrogen. 4. Derived from an acid by the loss of a water molecule: pyrosulfuric acid. [New Latin, from Greek puro-, from p  r, fire; see pa w in Indo-European roots.] |
pyro- before a vowel, pyr-
combining form
1. denoting fire, heat, or high temperature pyromania pyrometer
2. (Physics / General Physics) caused or obtained by fire or heat pyroelectricity
3. (Chemistry) Chem
a. denoting a new substance obtained by heating another pyroboric acid is obtained by heating boric acid
b. denoting an acid or salt with a water content intermediate between that of the ortho- and meta- compounds pyro-phosphoric acid
4. (Earth Sciences / Minerals) Mineralogy
a. having a property that changes upon the application of heat pyromorphite
b. having a flame-coloured appearance pyroxylin
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