Definition of galactose in English:

Share this entry


Pronunciation: /ɡəˈlaktəʊz/
Pronunciation: /ɡəˈlaktəʊs/


[mass noun] Chemistry
A sugar of the hexose class which is a constituent of lactose and many polysaccharides.
Example sentences
  • 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.


Mid 19th century: from Greek gala, galaktos 'milk' + -ose2.

For editors and proofreaders

Line breaks: gal¦act|ose

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.