zoopsychology 1. A branch of psychology that studies animal behavior. 2. The behavior and mental processes of animals; animal psychology. Inter-related cross references, directly or indirectly, involving the 'mind, mental' word units: anima-; anxi-; deliri-; hallucina-; menti-; moro-; noo-;... Found on http://www.wordinfo.info/words/index/info/view_unit/2730/16