[1] : The Collaborative International Dictionary of English v.0.48

galactose \galac"tose\, n. chem.
   a white, crystalline sugar, c6h12o6, isomeric with
   dextrose, obtained by the decomposition of milk sugar, and
   also from certain gums. when oxidized it forms mucic acid.
   called also lactose though it is not lactose proper.
   1913 webster
see also:
c6h12o6 lactose 

[2] : WordNet (r) 2.0

galactose
     n : a simple sugar found in lactose syn: brain sugar
see also:
brain sugar 

Galactose >> G Words
Galactose, definition of term: Galactose
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