pyran

[ pahy-ran, pahy-ran ]

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.

pyran

/ 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

pyran

/ 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.

Word History and Origins

Origin of pyran¹

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

Word History and Origins

Origin of pyran¹

C20: from pyro- + -an