complejas

Complejas is the feminine plural form of the Spanish adjective complejo, meaning "complex" in the sense of being made of many interconnected parts or difficult to understand. It is used to describe feminine nouns and agrees in gender and number with the noun it modifies: complejo (masculine singular), compleja (feminine singular), complejos (masculine plural), complejas (feminine plural).

From Latin complexus, formed by com- "together" and plectere "to weave" or "to fold," the term has widespread use across science, philosophy, and everyday language.

Complejas appears in phrases such as "situaciones complejas" (complex situations), "figuras complejas" (complex figures), or "estructuras complejas" (complex structures). In these contexts it functions as an ordinary adjective, not as a separate concept.

In mathematics, the standard term for a complex number is "número complejo" in the singular and "números complejos" in the plural. The feminine plural "complejas" would be used only to describe feminine-headed nouns, for example "entidades complejas" or "figuras complejas," not to denote complex numbers themselves.

See also: complejo, complejidad, lenguaje, terminología matemática.