1. The study of psychology from a biological point of view (including the anatomy, physiology, and pathology of the mind) emphasizing the adaptive or functional aspects of behavior that enable the organism to meet survival challenges that are posed by the environment; synonym: biopsychology.
2. A method of psychoanalysis employing distributive analysis, that includes a study of all mental and physical factors involved in an individual's growth and development.
3. Objective psychobiology involves a special emphasis on the various relationships of the individual to his or her environment.
4. The branch of biology dealing with the relations or interactions between body and behavior, especially as exhibited in the nervous system, receptors, effectors, or the like.
5. The study of the interrelationships of biology and psychology in cognitive functioning, including intellectual, memory, and related neurocognitive processes.