pyran

== English == === Etymology === pyre + -an === Pronunciation === === Noun === pyran (plural pyrans) (organic chemistry) Any of a class of unsaturated heterocyclic compounds containing a ring of five carbon atoms, an oxygen atom and two double bonds; especially the simplest one, C5H6O. ==== Derived terms ==== ==== Related terms ==== pyre pyrite pyrex ==== Translations ==== ==== See also ==== furan === Anagrams === pryan