The hyphen () is a punctuation mark used to join words and to separate syllables of a single word. The use of hyphens is called hyphenation. The hyphen should not be confused with dashes (‒, –, —, ―), which are longer and have different uses, or with the minus sign (−) which is also longer.

Read more about Hyphen:  Etymology, Usage in English, Varied Meanings, Origin and History, In Computing, Usage in Date Notation, Unicode