Poly-saccharides are complex carbohydrates made up of repeating units of monosaccharides. These biopolymers are found in a variety of living organisms, serving as storage and structural components. There are several synonyms for the term poly-saccharides that refer to this class of biopolymers. Some of the commonly used synonyms include glycans, oligosaccharides, polysaccharose, and mucopolysaccharides. These synonyms denote the various types of poly-saccharides found in nature, such as chitin, cellulose, starch, and glycosaminoglycans. The study of poly-saccharides is an important area of research in biochemistry, providing insights into the molecular mechanisms of various biological processes.