cel·lo·bi·ose (s?l??-b???s?, -?z?)n. A disaccharide that is produced from the partial hydrolysis of cellulose.[cell(ulose) + bi- + -ose.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.cellobiose (?s?l???ba???z) or cellosen (Biochemistry) a disaccharide obtained by the hydrolysis of cellulose by cellulase. Formula: C12H22O11[C20: from cellulose + bi-1 + -ose2]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014