IN VIVO By Nugent, Pam M.S. - May 11, 2013 1. The conditions and biological processes occurring in an organism. Compare in vitro. 2. the condition or process approximating a real life setting created for research. IN VIVO: "Joe modelled his in vivo research on a real life scenario." Related Psychology Terms BIOTOPE MENTALISM BIORHYTHMS APPLIED SPORT PSYCHOLOGY BIOGENIC OVERCONFIDENCE IN VITRO BIOLOGICAL FALLACY BIONOMIC FACTOR BIOLOGICAL FACTOR Cite this page: Nugent, Pam M.S., "IN VIVO," in PsychologyDictionary.org, May 11, 2013, https://psychologydictionary.org/in-vivo/ (accessed June 26, 2017).