natriuresis
noun
na·tri·ure·sis ˌnā-trē-yu̇-ˈrē-səs 
: excessive loss of sodium in the urine
natriuretic
ˌnā-trē-yu̇-ˈre-tik
adjective or noun 
Word History
Etymology
New Latin natrium "sodium" (from natr- —in French natron natron— + New Latin -ium -ium) + English -uresis (in diuresis, enuresis)
First Known Use
1957, in the meaning defined above
Medical Definition
natriuresis
noun
na·tri·ure·sis ˌnā-trē-(y)ə-ˈrē-səs
variants also natruresis
-trə-ˈrē-səs
: excessive loss of cations and especially sodium in the urine