1º_ It is a space of its own and reserved, defined and separated from other similar ones. The following meanings are derived from the original concept taken from the old Italian nicchio that could be interpreted as "nest, hollow as hiding place, shell of a mollusk". 2º_ In architecture it is a hole in a wall as a niche to place a statue or other ornament, also in cemeteries is each space in the walls to place a coffin or an urn. 3º_ In marketing is a group of customers defined by their social, economic and cultural characteristics to whom a product and its advertising are directed. 4º_ In biology is the ecosystem of a species.
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