a·rab·i·nose (?-r?b??-n?s?, ?r??-b?-)n. A pentose sugar, C5H10O5, obtained from plant polysaccharides such as gums and hemicelluloses.[(gum) arab(ic) + -in + -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.arabinose (??ræb??n??z; -?n??s) n (Elements & Compounds) a pentose sugar in plant gums, esp of cedars and pines. It is used as a culture medium in bacteriology. Formula: C5H10O5[C19: from arabin (from (gum) arab(ic) + -in) + -ose2]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014a?rab?i?nose (??ræb ??no?s) n. a white, crystalline solid, C5H10O5, used esp. as a culture medium in bacteriology. [1880?85; arabin the soluble essence of certain gums = ((gum) arab(ic) + -in1) + -ose2] a?rab`i?nos?ic (-?n?s ?k) adj. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.