colon
n//ˈkoʊ.lən//kolon, grovtarm, tjocktarm
The punctuation mark ⟨:⟩.
(anatomy) Part of the large intestine; the final segment of the digestive system, after (distal to) the ileum and before (proximal to) the rectum. (Because the colon is the largest part of the large intestine (constituting most of it), it is often treated as synonymous therewith in broad or casual usage.)