pyran

(pī′ran′, pī ran′)

noun

any of a group of closed-chain compounds containing a ring, CHO, of one oxygen atom and five carbon atoms

Origin: pyr(one) + -an

See pyran in American Heritage Dictionary 4

noun

Either of two isomeric compounds with the formula C₅H₆O, having a ring of five carbon atoms and one oxygen atom.

Origin:

Origin: pyrone, heterocyclic compound (pyr(o)- + -one)

Origin: + -an²

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