ˈrīˌbōs also -ōz noun
( -s )
Etymology: International Scientific Vocabulary ribo nic + -ose
: a crystalline aldose sugar of the pentose class C 5 H 10 O 5 found especially as the d -form as a constituent of many nucleosides (as adenosine, cytidine, guanosine) and obtained usually from ribonucleic acid by hydrolysis or from altrose by degradation