Definition of mannose in US English:



  • A sugar of the hexose class which occurs as a component of many natural polysaccharides.

    • ‘The outermost layer of the cell wall is composed of diverse proteins bearing polysaccharide side chains composed of mannose.’
    • ‘The mannose is dissolved in water and/or incorporated in a pharmaceutical agent or food for the purpose of administration.’
    • ‘Other sugars found in foods, such as sucrose (table sugar), fructose (fruit sugar) and mannose are converted to glucose almost as quickly as starch is.’
    • ‘Asian and African populations showed selection in genes affecting the metabolism of the plant sugars mannose and sucrose.’
    • ‘These data suggest that galactose and mannose may compete with glucose for uptake, whereas sucrose and fructose do not.’


Late 19th century: from mannite ‘mannitol’ + -ose.