an amino derivative of glucose that is a component of many polysaccharides
"The doctor explained that glucosamine, as an amino derivative of glucose serving as a key component in joint cartilage, could help alleviate his arthritis pain."
An amino derivative of glucose that is a component of polysaccharides such as chitin; it is marketed as a dietary supplement supposedly to reduce the symptoms of arthritis.
"After consulting his doctor, my grandfather decided to start taking glucosamine in hopes that it would finally ease his morning knee pain."