Sentence:  Not less than 70 milligrams of Aureomycin per head daily to aid in the prevention of <WSD>liver</WSD> abscesses in feed-lot beef cattle . 
Meaning of the word marked with <WSD> tags:  large and complicated reddish-brown glandular organ located in the upper right portion of the abdominal cavity; secretes bile and functions in metabolism of protein and carbohydrate and fat; synthesizes substances involved in the clotting of the blood; synthesizes vitamin A; detoxifies poisonous substances and breaks down worn-out erythrocytes