/ruy"bohs/ , n. Biochem.
a white, crystalline, water-soluble, slightly sweet solid, C 5 H 10 O 5 , a pentose sugar obtained by the hydrolysis of RNA.
[ 1890-95; Ribose, earlier Ribonsäure, equiv. to Ribon (from Arabinose ARABINOSE, by arbitrary rearrangement and shortening) + Säure acid ]