na·tri·u·re·sis 
(nā′trə-y-rēsĭs)
(nā′trə-y-rēsĭs)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·retic (-rĕtĭk) adj.