Etymology
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oliguria (n.)

in pathology, "scantiness of urine," 1843, from oligo- "small, little," + -uria, from Greek ouron "urine" (see urine).

updated on August 20, 2019

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Definitions of oliguria from WordNet

oliguria (n.)
abnormally small production of urine; can be a symptom of kidney disease or obstruction of the urinary tract or edema or an imbalance of fluids and electrolytes in the body;
oliguria (n.)
production of an abnormally small amount of urine;
From wordnet.princeton.edu, not affiliated with etymonline.