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WordReference Random House Learner's Dictionary of American English © 2024pyro-, prefix. - pyro- comes from Greek, where it has the meaning "fire, heat, high temperature'':pyromania, pyrotechnics.
Collins Concise English Dictionary © HarperCollins Publishers:: pyro-, (before a vowel)pyr- combining form - denoting fire, heat, or high temperature: pyromania, pyrometer
- denoting a new substance obtained by heating another: pyroboric acid is obtained by heating boric acid
- having a property that changes upon the application of heat
- having a flame-coloured appearance: pyroxylin
Etymology: from Gk pur fire py•ro (pī′rō),USA pronunciation n., pl. -ros. [Informal.]- Informal Termsa pyromaniac.
pyro-, - a combining form meaning "fire,'' "heat,'' "high temperature,'' used in the formation of compound words:pyrogen;pyrolusite;pyromancy.
- Chemistrya combining form used in the names of inorganic acids, indicating that the acid's water content is intermediate between that of the corresponding ortho- (more water) and meta- (least water) acids (pyroantimonic, H4Sb2O7, pyroarsenic, H4As2O7, and pyrosulfuric, H2S2O7, acids). The combining form is also used in the names of the salts of these acids. If the acid ends in -ic, the corresponding salt ends in -ate (pyroboric acid, H2B4O7, and potassium pyrobate, K2B4O7, or pyrosulfuric, H2S2O7, and pyrosulfate, N2S2O7);
if the acid ends in -ous, the corresponding salt ends in -ite (pyrophosphorous acid, H4P2O5, potassium pyrophosphite, K4P2O5).
Also, pyr-. - Greek pyro-, combining form of pŷr fire
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