1. 冒号
A colon is the punctuation mark : which you can use in several ways. For example, you can put it before a list of things or before reported speech.

2. 结肠
Your colon is the part of your intestine above your rectum.

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

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

3. the basic unit of money in Costa Rica
equal to 100 centimos

Synonym: Costa Rican colon

4. the basic unit of money in El Salvador
equal to 100 centavos

Synonym: El Salvadoran colon