1.A usually nonmalignant growth or tumor protruding from the mucouslining of an organ such as the nose, bladder, or intestine, often causing obstruction.
3.A viral infection characterized by inflammation of the mucous membranes lining the upper respiratory passages and usually accompanied by malaise, fever, chills, coughing, and sneezing.
4.A lesion of the skin or a mucous membrane such as the one lining the stomach or duodenum that is accompanied by formation of pus and necrosis of surrounding tissue, usually resulting from inflammation or ischemia.
