glucosamine

noun

any hexosamine that is glucose in which at least one of the hydroxy groups has been replaced by an amino group

Wiktionary

noun

Etymology: Etymology tree Ancient Greek γλεῦκος (gleûkos)der. French glucose English glucose Egyptian jmnbor. Ancient Greek Ᾰ̓́μμων (Ắmmōn)bor. Latin Ammōn Latin ammoniacusder. English ammonia Proto-Indo-European *-nós Proto-Indo-European *-iHnos Proto-Italic *-īnos Latin -īnusder. Old French -inbor. Middle English -in English -ine English amine English -amine English glucosamine From glucose + -amine.

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.