pyrone

pyrone

[pahy-rohn, pahy-rohn]
noun Chemistry.
either of two heterocyclic ketones having the formula C 5 H 4 O 2 .

Origin:
1890–95; pyr- + -one

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pyrone (ˈpaɪrəʊn, paɪˈrəʊn)
 
n
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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