Pyran meaning

pī'răn'
Either of two isomeric unsaturated compounds with the formula C5 H6 O, having a ring of five carbon atoms and one oxygen atom.
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Any of a group of closed-chain compounds containing a ring, C5H6O, of one oxygen atom and five carbon atoms.
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Any of a class of compounds having a ring of five carbon atoms and one oxygen atom and two double bonds. The pyran ring structure forms part of many organic compounds, especially sugars.
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An unstable compound that is the simplest member of this class. Chemical formula: C5H6O.
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(chemistry) Any of a class of heterocyclic compounds containing a ring of five carbon atoms and an oxygen atom; especially the simplest one, C5H6O.
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Origin of pyran

  • pyrone heterocyclic compound (pyr(o)–) (–one) –an
    From American Heritage Dictionary of the English Language, 5th Edition