Viscera: The internal organs of the body, specifically those within the chest (as the heart or lungs) or abdomen (as the liver, pancreas or intestines). The singular of "viscera" is "viscus" meaning in Latin "an organ of the body." From Healthy Resources Mucus Relief: Find the Right SolutionBMI Calculator: What Your Numbers Mean Featured Centers What Are the Best PsA Treatments for You?Understanding Biologics 10 Things People With Depression Wish You Knew