The term anomers of glucose refers to

Cyclization of the open chain structure of D-(+)- glucose has created a new streocenter at $C_1$  which explains the existence of two cyclic forms D-(+)-  glucose, namely $\mathrm{\alpha }-$  and $\mathrm{\beta }-$  These two cyclic forms are diasteromers, such diastereomers which differ only in the configuration of chiral carbon developed on hemiacetal formation (it is ${\mathrm{C}}_1$  in glucose and ${\mathrm{C}}_2$  in fructose) are called anomers and  the hemiacetal carbon $\left({\mathrm{C}}_1\mathrm{or}{\mathrm{C}}_2\right)$  is called the anomeric carbon