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1892, from German Ribose (1891), from Ribonsäure, a tetrahydroxy acid, with first element shortened and arbitrarily rearranged from English arabinose (c.1880), a sugar which is so called because it is formed from gum arabic.
ribose ri·bose (rī'bōs')
A pentose sugar occurring as a component of riboflavin, nucleotides, and nucleic acids.