Ellipsis

Ellipsis (plural ellipses; from the Greek: ἔλλειψις, élleipsis, "omission") in printing and writing refers to a mark or series of marks that usually indicate an intentional omission of a word or a phrase from the original text. An ellipsis can also be used to indicate a pause in speech, an unfinished thought or, at the end of a sentence, a trailing off into silence (aposiopesis).

The most common form of an ellipsis is a row of three periods (...). Forms encountered less often are: three asterisks (***), one em dash (—), multiple en dashes (––), and the Unicode Ellipsis symbol […].

The triple-dot punctuation mark is also called a suspension point, points of ellipsis, periods of ellipsis, or colloquially, dot-dot-dot.

Source: http://en.wikipedia.org/wiki/Ellipsis