pyran

American  

[pahy-ran, pahy-ran] / ˈpaɪ ræn, paɪˈræn /

noun

Chemistry.

1. either of two compounds having the formula C 5 H 6 O, containing one oxygen and five carbon atoms arranged in a six-membered ring.

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pyran British  

/ ˈpaɪræn, paɪˈræn /

noun

1. 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

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pyran Scientific  

/ pī′răn′ /

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: C ₅ H ₆ O.

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Etymology

Origin of pyran

1900–05; pyr(one) + -an, variant of -ane