brown sugar vs disaccharide

brown sugar

noun
  • Refined sugar to which molasses has been added. 

  • An attractive black woman. 

  • Heroin. 

  • Sugar which has been only partially refined and still contains molasses. 

disaccharide

noun
  • Any sugar, such as sucrose, maltose and lactose, consisting of two monosaccharides combined together. 

How often have the words brown sugar and disaccharide occurred in a corpus of books? (source: Google Ngram Viewer )