idênticos

Idénticos is the plural masculine form of the Spanish adjective idéntico, used to describe things that are the same in all essential aspects or indistinguishable in a given context. The feminine form is idéntica, and the singular forms are idéntico (masculine) and idéntica (feminine). It is commonly used with nouns referring to objects, measurements, or people, as in dos copas idénticas or dos problemas idénticos. In phrases, it often appears in constructions such as idéntico a or idénticos entre sí.

In biology, the term is used in the expression gemelos idénticos to denote monozygotic twins, two individuals derived from a single fertilized egg that splits, resulting in nearly identical genetic material. In philosophy, logic, and mathematics, the concept of identidad relates to sameness: something that is idéntico to itself and can be described as being identical to another object under a specified relation or property.

Etymology traces idéntico to Latin identicus, from idem meaning “the same.” The Spanish form preserves the root meaning of sameness and has extended use across science, everyday language, and scholarly discourse. Usage notes: adjectives agree in gender and number with the noun they modify, and a common expression is "idéntico a" to indicate equivalence or sameness with respect to a given criterion. The term can rarely function as a noun, for example referring to a group of objects that are the same, though this is less common in everyday speech.

See also: identidad, identidad personal, identidad matemática, gemelos idénticos, igualdad.