Wiktionary
pyranose
n. (context chemistry English) any cyclic hemiacetal form of a monosaccharide having a six-membered ring (based on tetrahydropyran)
Wikipedia
Pyranose
Pyranose is a collective term for carbohydrates that have a chemical structure that includes a six-membered ring consisting of five carbon atoms and one oxygen atom. There may be other carbons external to the ring. The name derives from its similarity to the oxygen heterocycle pyran, but the pyranose ring does not have double bonds. A pyranose in which the anomeric OH at C(l) has been converted into an OR group is called a pyranoside.
Tetrahydropyran
Name