pyran

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

noun Chemistry.

either of two compounds having the formula C5H6O, containing one oxygen and five carbon atoms arranged in a six-membered ring.

Origin of pyran

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

Words nearby pyran

pyramidical, pyramidion, pyramids, pyramine, pyramus and thisbe, pyran, pyranometer, pyranose, pyranoside, pyrargyrite, pyrazinamide

British Dictionary definitions for pyran

pyran
/ (ˈpaɪræn, paɪˈræn) /

noun

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

Word Origin for pyran

C20: from pyro- + -an

Scientific definitions for pyran

pyran
[ pī′răn′ ]

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