vis·cus \ˈviskəs\noun (pluralvis·cera \ˈvisərə\) Etymology: Latin 1.: an internal organ of the body; especially: one (as the heart, liver, or intestine) located in the great cavity of the trunk proper 2.viscera plural: inner or interior matter or contents < the magazine's viscera were arranged in an unusually agreeable order — New Republic > < getting at the viscera of the old sofa >