Complex (disambiguation)

A complex is a whole that comprehends a number of intricate parts, especially one with interconnected or mutually related parts; for example, a complex of buildings.

Complex may refer to:

Psychology

 * Complex (psychology), a group of mental factors that are unconsciously associated by the individual with a particular subject and influence the individual's attitude and behavior
 * Electra complex
 * Oedipal complex

Biology

 * Complex (taxonomy), in biology, a cluster of species so closely related that they intergrade, can interbreed, and are difficult to firmly distinguish except at the extremes of their ranges
 * Mimicry complex, a complex system of organisms and dependencies involved in a case of mimicry

Medicine

 * AIDS dementia complex

Other scientific uses

 * Synonym for a complex system which generally includes all interactions between elements