biológicas

Biológicas is the feminine plural form of the adjective biológico in Spanish and Portuguese. It is used to describe things related to biology or living organisms and agrees with feminine nouns. For example, muestras biológicas (biological samples), sustancias biológicas (biological substances), and reservas biológicas (biological reserves). The term also appears in the name of the biological sciences as a field, written as ciencias biológicas or ciências biológicas.

In everyday and professional usage, biológicas helps distinguish biological aspects from other domains. It is common in education, healthcare, environmental science, and policy contexts. Note that when referring to masculine nouns or to the general field, one uses biológico or biológicos accordingly; for example, agentes biológicos (biological agents) and investigación biológica (biological research).

Etymology and language notes: the form derives from the root bio- meaning life and the suffix -lógica/-logia meaning study or science. The word follows standard gender and number agreement rules of Spanish and Portuguese, and its usage spans Latin American and Iberian contexts. In some compound terms or institutional names, the expression may appear as part of a longer proper noun rather than as a free-standing descriptor.

See also: biology, biological sciences, biology-related terminology.