PLEXUS By N., Sam M.S. - 2 noun. a network of alike structures which are operationally or anatomically interlinked. PLEXUS: "Plexus constructs exist in the respiratory system as the brachian plexus." Related Psychology Terms CELIAC PLEXUS EMOTION (Theories) BRACHIAL PLEXUS NEURON (Nerve Cell) COMMON COLD THEOBROMINE ORGANIZATIONAL STRUCTURE REPERTORY GRID ANTERIOR CHOROIDAL ARTERY BULBAR Cite this page: N., Sam M.S., "PLEXUS," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/plexus/ (accessed July 3, 2022).