1) Symptom 
Natriuresis is the process of excretion of sodium in the urine via action of the kidneys. Natriuresis is promoted (more sodium is excreted) by Brain and Atrial natriuretic peptides, and it is inhibited (sodium is conserved) by chemicals such as aldosterone. Natriuresis lowers the concentration of sodium in the blood and also tends to lower blood v...
(L. natrium sodium + Gr. oursis a making water) the excretion of abnormal amounts of sodium in the urine. 
<physiology> The excretion of abnormal amounts of sodium in the urine. ... Origin: L. Natrium = sodium, Gr. Ouresis = a making water ... (18 Nov 1997) ... 
(na″tre-u-re´sis) the excretion of sodium in the urine; see also salt wasting and salt-losing crisis (syndrome).
Type: Term Pronunciation: nā′trē-yū-rē′sis Definitions: 1. Urinary excretion of sodium; commonly designates enhanced sodium excretion, which may occur in certain diseases or as a result of the administration of diuretic drugs.
Natriuresis: The excretion of an excessively large amount of sodium in the urine. Natriuresis is similar to diuresis (the excretion of an unusually large quantity of urine), except that in natriuresis the urine is exceptionally salty. Natriuresis occurs with some diuretics and diseases (as of the adrenal) and can lead to the salt-losing syndrome ch...
[n] - the presence of abnormally large amounts of sodium in the urine
noun the presence of abnormally large amounts of sodium in the urine
excretion of sodium in the urine.