• synonyms


[ rahy-bohs ]
/ ˈraɪ boʊs /

noun Biochemistry.

a white, crystalline, water-soluble, slightly sweet solid, C5H10O5, a pentose sugar obtained by the hydrolysis of RNA.

Nearby words

ribonucleic, ribonucleic acid, ribonucleoprotein, ribonucleoside, ribonucleotide, ribose, ribose 5-phosphate isomerase, riboso, ribosomal rna, ribosome, ribosuria

Origin of ribose

1890–95; < German Ribose, earlier Ribonsäure, equivalent to Ribon (from Arabinose arabinose, by arbitrary rearrangement and shortening) + Säure acid Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for ribose


/ (ˈraɪbəʊz, -bəʊs) /


biochem a pentose sugar that is an isomeric form of arabinose and that occurs in RNA and riboflavin. Formula: CH 2 OH(CHOH) 3 CHO

Word Origin for ribose

C20: changed from arabinose
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for ribose



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.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for ribose


[ rībōs′ ]


A pentose sugar occurring as a component of riboflavin, nucleotides, and nucleic acids.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for ribose


[ rībōs′ ]

A pentose sugar with a furanose structure that occurs as a component of riboflavin and RNA. Chemical formula: C5H10O5.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.