- published: 28 Mar 2013
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The colon, in Unicode U+003A : colon (HTML: :
), is a punctuation mark consisting of two equally sized dots centered on the same vertical line.
A colon informs the reader that what follows the mark proves, explains, or lists elements of what preceded the mark.
The Bedford Handbook describes several uses of a colon. For example, one can use a colon after an independent clause to direct attention to a list, an appositive, or a quotation. Also, it can be used between independent clauses if the second summarizes or explains the first. Furthermore, one may use a colon after the salutation in a formal letter, to indicate hours and minutes, to show proportions, between a title and subtitle, and between city and publisher in bibliographic entries.
Luca Serianni, an Italian scholar who helped to define and develop the colon as a punctuation mark, identified four punctuational modes for it: syntactical-deductive, syntactical-descriptive, appositive, and segmental. Although Serianni wrote this guide for the Italian language, his definitions apply also to English and many other languages.
Colon may refer to: