Definition of arabinose in English:


Pronunciation /əˈrabəˌnōs//ˈarəbə-/


  • A sugar of the pentose class that is a constituent of many plant gums.

    • ‘The pretreated fiber contains sugars, mainly arabinose and xylose and some glucose.’
    • ‘Carbon sources were either 0.2% glucose or 0.2% arabinose.’
    • ‘The cell walls of the endosperm are composed largely of mannose, with lesser amounts of glucose, galactose and arabinose.’
    • ‘It is composed of galactose and arabinose molecules in a 6: 1 ratio, with a small amount of glucuronic acid.’
    • ‘It can appear in the urine of autistic children at very high levels, and the source is unclear but Shaw suggests it could be a product of breakdown of arabinose in the gut.’


Late 19th century: from arabin, a carbohydrate derived from gum arabic, (based on gum arabic + -in) + -ose.