A decreased production in the volume of urine.(noun)
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Use "oliguria" in a sentence
"Other signs and symptoms, such as oliguria, unexplained crying (especially on urination), and edema, and any history of passing stones were recorded."
"Renal effects include oliguria or anuria (little or no urine excretion) due to tubular necrosis, often preceded by the formerly mentioned effects Mercury and Iron salts."