pyran[pī′ran′, pī ran′]
any of a group of closed-chain compounds containing a ring, CHO, of one oxygen atom and five carbon atoms
Origin of pyranpyr(one) + -an
Either of two isomeric unsaturated compounds with the formula C5H6O, having a ring of five carbon atoms and one oxygen atom.
Origin of pyranpyrone, heterocyclic compound (pyr(o)– + –one) + –an2.