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Definition of pyro - 4 dictionary results

py⋅ro

  [pahy-roh]
Use pyro in a Sentence
–noun, plural -ros. Informal.
a pyromaniac.
Origin:
by shortening; cf. -o

pyro-

 
1. a combining form meaning “fire,” “heat,” “high temperature,” used in the formation of compound words: pyrogen; pyrolusite; pyromancy.
2. Chemistry. a 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-.

Origin:
< Gk pyro-, comb. form of pŷr fire
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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py·ro   (pī'rō)   
n.   pl. py·ros Slang
  1. A person who has a compulsion to set fires; a pyromaniac.
  2. A display of pyrotechnics.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Pyro

Py"ro\, n. (Photog.) Abbreviation of pyrogallic acid. [Colloq.]
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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