The term anomers of glucose refers to

Cyclization of the open chain structure of D-(+)- glucose has created a new streocenter at C1  which explains the existence of two cyclic forms D-(+)-  glucose, namely α−  and β−  These two cyclic forms are diasteromers, such diastereomers which differ only in the configuration of chiral carbon developed on hemiacetal formation (it is C1  in glucose and C2  in fructose) are called anomers and  the hemiacetal carbon (C1 or  C2)  is called the anomeric carbon