suspension point

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun One of a series of dots, usually three, used to indicate an incomplete statement or the omission of a word or words from a written text.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun (usually plural) one of a series of points indicating that something has been omitted or that the sentence is incomplete