(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.

plural of pyran

(organic chemistry) concerning pyran

(chemistry) any cyclic hemiacetal form of a monosaccharide having a six-membered ring (based on tetrahydropyran)

An actinometer used to measure solar radiation incident on a surface.

plural of pyranose

plural of pyranometer

Of, pertaining to, or produced by a pyranometer

(biochemistry) Any glycoside of a pyranose

(organic chemistry) Of, pertaining to, or having the structure of a pyranose