na·tri·u·re·sis  (nā'trə-yŏŏ-rē'sĭs)  n. Excretion of excessive amounts of sodium in the urine. [New Latin natriūrēsis : natrium, sodium (from French natron, natron; see natron) + ūrēsis, urination (from Greek ourēsis, from ourein, to urinate; see uretic).] na'tri·u·ret'ic (-rět'ĭk) adj. |