pyrone

American  

[pahy-rohn, pahy-rohn] / ˈpaɪ roʊn, paɪˈroʊn /

noun

Chemistry.

1. either of two heterocyclic ketones having the formula C 5 H 4 O 2 .

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pyrone British  

/ 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

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Etymology

Origin of pyrone

First recorded in 1890–95; pyr- + -one

Example Sentences

Pyrrol yields an analogous series: pyrazole, imidazole or glyoxaline, azimide or osotriazole, triazole and tetrazole: Six-membered ring systems can be referred back, in a manner similar to the above, to pyrone, penthiophene and pyridine, the substances containing a ring of five carbon atoms, and an oxygen, sulphur and nitrogen atom respectively.

From Project Gutenberg