ecphoneme

Noun

 * 1)  An exclamation mark.
 * 2) * 1858, Goold Brown, The Grammar of English Grammars, fourth edition, Samuel S. and William Wood, page 800,
 * The Ecphoneme, or Note of Exclamation, is used to denote а pause with some strong emotion of admiration, joy, grief, or other feeling; and, as a sign of great wonder, it is sometimes, though not very elegantly, repeated

Synonyms

 * bang
 * exclamation mark
 * exclamation point