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lactogenic
lactoglobulin
lactometer
lactone
lactoprotein
lactose
lactose intolerance
lactovegetarian
lactulose
lacuna
lacunar
lacustrine
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lactulose

lac·tu·lose [ láktyə lss, láktyə lz ]


noun 
Definition:
 
sugar for treating constipation: a synthetic sugar that is broken down by bacteria in the colon into products that draw water and ammonia into the colon. Use: treatment of constipation and symptoms of liver disease.

[Mid-20th century. <lacto-, probably after cellulose]
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