En lingüística, el guion (-) es un signo ortográfico auxiliar, en forma de pequeña línea horizontal. No debe confundirse con el signo menos (−), que es dos veces más largo que el guion, ni con la raya (—), que es de mayor longitud.

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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 in some contexts. As an orthographic concept, the hyphen is a single entity. In terms of character encoding and display, that entity is represented by any of several characters and glyphs (including hard hyphens, soft or optional hyphens, and nonbreaking hyphens), depending on the context of use (). Although, as mentioned above, hyphens are not to be confused with en dashes and minus signs, there are some overlaps in (in which either a hyphen or an en dash may be acceptable, depending on user preference; ) and in character encoding (which often uses the same character, called a "hyphen-minus", to represent both the hyphen and minus sign entities; ).

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