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Updated December 10, 2012

Definition: Mucus is a secretion produced by the mucus membranes in the digestive, reproductive, respiratory, and urinary tracts. Mucus is white, yellow, or clear, and is a slick, viscous fluid with the consistency of jelly. Mucus is often passed along with stool in people who have ulcerative colitis or irritable bowel syndrome.
Common Misspellings: mucous

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