What are glycosidic bonds in carbohydrates?

Glycosidic bonds are how monomers (monosaccharides) are linked together to form a polysaccharide. Like with all nutrient reactions, this is done through a condensation or dehydration reaction. The two carboxyl groups of two monomers come together. One monomer donates a hydrogen, while the other donates a hydroxyl, creating a molecule of water.