Colon

That part of the large intestines which extends from the caecum to the rectum. [See Illust of Digestion.]

A point or character, formed thus [:], used to separate parts of a sentence that are complete in themselves and nearly independent, often taking the place of a conjunction.

the part of the large intestine between the cecum and the rectum; it extracts moisture from food residues before they are excreted

a punctuation mark (‘:’) used after a word introducing a series or an example or an explanation (or after the salutation of a business letter)