Meaning of galactose in English:


Pronunciation /ɡəˈlaktəʊz/ /ɡəˈlaktəʊs/


mass nounChemistry
  • A sugar of the hexose class which is a constituent of lactose and many polysaccharides.

    ‘Its molecule is split in fermentation or digestion to yield the simple monosaccharide sugars dextrose and galactose.’
    • ‘The sugars glucose, galactose, and fructose all have six carbon atoms, twelve hydrogen atoms, and six oxygen atoms.’
    • ‘The enzyme lactase breaks down the lactose to galactose and glucose.’
    • ‘The enzyme splits and hydrolyzes dietary lactose into glucose and galactose for transport across the cell membrane.’
    • ‘The main symptom of this disease, which is treatable by the complete removal of lactose and galactose from the diet, is early onset cataracts.’


Mid 19th century from Greek gala, galaktos ‘milk’ + -ose.