colon
nounIn anatomy, the largest of the intestines, or rather the largest division of the intestinal canal; beginning at the ceecum, and ascending by the right kidney, it passes under the hollow part of the liver, and the bottom of the stomach, to the spleen; thence descending by the left kidney, it passes, in the form of an S, to the upper part of the os sacrum, where, from its straight course, the canal takes the name of rectum.