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Variant of pyro-.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
a variant of pyro-
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
1. a combining form meaning “fire,” “heat,” “high temperature,” used in the formation of compound words: pyrogen; pyromancy.
2.Also, esp. before h or a vowel, pyr-.
a. a combining form used in the names of inorganic acids, the water content of which is intermediate between the ortho and meta forms of an acid: pyrophosphoric acid.
b. a combining form used in the names of the salts of these acids.
[< Greek pyro-, comb. form of pŷr fire]
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