stomachListen to pronunciation(STUH-muk)An organ that is part of the digestive system. The stomach helps digest food by mixing it with digestive juices and churning it into a thin liquid.More InformationWhat Is Stomach Cancer?Enlarge this image in new windowThe stomach is an organ in the upper abdomen. It can be divided into the cardia and the non-cardia, which includes the fundus, the body, the antrum, and the pylorus. The stomach is part of the digestive system.Search NCI's Dictionary of Cancer TermsStarts withContainsBrowse:ABCDEFGHIJKLMNOPQRSTUVWXYZ#