Sentence:  The <WSD>liver</WSD> weighed 2090 gm. , was brown in color , and the cut surface was mottled by irregular pale areas . 
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