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[poly- + -uria]
Excessive secretion and discharge of urine; specifically, urination in excess of 50 mL/kg of body weight per day. The urine generally does not contain abnormal constituents. Several liters in excess of normal may be voided each day. The urine is virtually colorless. Specific gravity is 1.000 to 1.002 (higher in diabetes mellitus). Polyuria occurs in diabetes insipidus, diabetes mellitus, chronic nephritis, nephrosclerosis, hyperthyroidism, following edematous states (esp. those induced by heart failure treated with diuretics), and following excessive intake of liquids.

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