Definition of lactulose in English:


Syllabification: lac·tu·lose
Pronunciation: /ˈlakt(y)əˌlōs, -ˌlōz


  • A synthetic sugar with laxative properties. It is a disaccharide consisting of glucose and fructose units.
    More example sentences
    • In addition, unabsorbed lactose has an osmotic effect not unlike that of lactulose, a synthetic laxative, increasing the amount of fluid retained in the bowel.
    • Osmotic laxatives such as lactulose are effective alternatives to soften hard stools.
    • The most effective daily treatments for opioid-induced constipation are senna, senna combined with a stool softener, Phillips' Milk of Magnesia (magnesium hydroxide) or lactulose.


1930s: from lacto- 'of milk', perhaps on the pattern of cellulose.

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