OSMOLARITY By N., Pam M.S. - April 7, 2013 noun. the concentration of an osmotic mixture, gauged in osmoles per liter of the mixture. OSMOLARITY: "The osmolarity of the two solutes was not expected by either researcher." Related Psychology Terms OSMOMETER PHYSIOLOGICAL SALINE THIRST TRIGRAM CONCEALED MEASUREMENT TREATMENT COMBINATION VICADIN VIBRATION RADIOIMMUNOASSAY (RIA) TRIAVIL Cite this page: N., Pam M.S., "OSMOLARITY," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/osmolarity/ (accessed February 24, 2020).