pyran

py·ran  (prn)

n.

Either of two isomeric compounds with the formula C₅H₆O, having a ring of five carbon atoms and one oxygen atom.

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[pyrone, heterocyclic compound (pyr(o)- + -one) + -an.]

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pyran [ˈpaɪræn paɪˈræn]

n

(Chemistry / Elements & Compounds) an unsaturated heterocyclic compound having a ring containing five carbon atoms and one oxygen atom and two double bonds. It has two isomers depending on the position of the saturated carbon atom relative to the oxygen

[from pyro- + -an]

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pyran  (prn)

1. 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.

2. An unstable compound that is the simplest member of this class. Chemical formula: C₅H₆O.