La reduplicación es un procedimiento morfológico usado en muchas lenguas, especialmente en la flexión, consistente en que una palabra completa o una parte de la misma se repita creando una nueva forma con un significado ligeramente diferente.

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Reduplication in linguistics is a morphological process in which the root or stem of a word (or part of it) or even the whole word is repeated exactly or with a slight change. Reduplication is used in inflections to convey a grammatical function, such as plurality, intensification, etc., and in lexical derivation to create new words. It is often used when a speaker adopts a tone more "expressive" or figurative than ordinary speech and is also often, but not exclusively, iconic in meaning. Reduplication is found in a wide range of languages and language groups, though its level of linguistic productivity varies. Reduplication is the standard term for this phenomenon in the linguistics literature. Other terms that are occasionally used include cloning, doubling, duplication, repetition, and tautonym when it is used in biological taxonomies, such as "Bison bison". The origin of this usage of tautonym is uncertain, but it has been suggested that it is of relatively recent derivation.

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