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glucosamine glu·co·sa·mine (glōō-kō'sə-mēn', glōō'kō-sə-mēn')
An amino derivative of glucose that is found especially in polysaccharides such as chitin and in cell membranes.
An amino derivative of glucose in which an amino group replaces a hydroxyl group. It is a component of many polysaccharides and is the basic structural unit of chitin. Glucosamine is used as an over-the-counter dietary supplement by some people with symptoms of arthritis. Chemical formula: C6H13NO5.