Glycosidic linkage refers to the bond that connects monosaccharide units together to form polysaccharides. Polysaccharides are described as long chains of sugars containing different monosaccharides as building blocks, and these building blocks are linked through glycosidic linkages.

For example, cellulose is a homopolymer consisting of only one type of monosaccharide, i.e., glucose, where glucose units are connected via glycosidic linkages. Similarly, starch and glycogen are polysaccharides formed by linking monosaccharide units through these bonds. The glycosidic linkage is essential for the formation of polymeric carbohydrate structures.