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pyrone

[pahy-rohn, pahy-rohn] /ˈpaɪ roʊn, paɪˈroʊn/
noun, Chemistry
1.
either of two heterocyclic ketones having the formula C 5 H 4 O 2 .
Origin
1890-1895
1890-95; pyr- + -one
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for pyrone

pyrone

/ˈpaɪrəʊn; paɪˈrəʊn/
noun
1.
either of two heterocyclic compounds that have a ring containing five carbon atoms and one oxygen atom with two double bonds and a second oxygen atom attached to a carbon atom in either the ortho-position (alpha pyrone) or the para-position (gamma pyrone)
2.
any one of a class of compounds that are substituted derivatives of a pyrone
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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