pyran[pī′ran′, pī ran′]
pyran definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of a group of closed-chain compounds containing a ring, CHO, of one oxygen atom and five carbon atoms
Origin: pyr(one) plush -an
pyran definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Either of two isomeric compounds with the formula C5H6O, having a ring of five carbon atoms and one oxygen atom.
Origin: pyrone, heterocyclic compound (pyr(o)- + -one) + -an2.
pyran - Science Definition
- 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.