The discharge of excessive large amount of sodium through urine.
Excretion of abnormally large amounts of sodium in the urine, usually the result of diuretic drug intake or certain metabolic disorders.
The excretion of sodium in the urine, particularly if the amount excreted is more than normal. An agent that causes this sodium excretion usually a diuretic is termed a natriuretic.
The excretion of abnormal amounts of sodium in the urine.