The term "selective" refers to the act of choosing or picking carefully from a larger group, often based on specific criteria or preferences.

Definitions by context:
General:
"Characterized by careful choice; discriminating."
Example: She is very selective about the books she reads.

Biology:
"A process or trait that favors certain characteristics or organisms over others."
Example: Selective breeding produces animals with desirable traits.

Education:
"Restricting admission to those who meet particular criteria."
Example: A selective university only admits top-performing students.

Technology/Medicine:
"Targeted action affecting only certain components or areas."
Example: A selective serotonin reuptake inhibitor (SSRI) affects specific neurotransmitters.