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pyrone

[pahy-rohn, pahy-rohn]
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noun Chemistry.
  1. either of two heterocyclic ketones having the formula C5H4O2.
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Origin of pyrone

First recorded in 1890–95; pyr- + -one
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for pyrone

pyrone

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
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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