What is the meaning of Colon?

noun

• The part of the large intestine between the cecum and the rectum; it extracts moisture from food residues before they are excreted.
• The basic unit of money in El Salvador; equal to 100 centavos.
  • synonyms: El Salvadoran colon
• The basic unit of money in Costa Rica; equal to 100 centimos.
  • synonyms: Costa Rican colon
• A port city at the Caribbean entrance to the Panama Canal.
  • synonyms: Aspinwall
• A punctuation mark (:) used after a word introducing a series or an example or an explanation (or after the salutation of a business letter. ).