pyro-

pyro-, 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 n., pl. -ros. [Informal.]

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-.

'pyro-' also found in these entries (note: many are not synonyms or translations):

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