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urinary frequency at night; called also nycturia.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


Purposeful urination at night, after waking from sleep; typically caused by nocturnal urine volume in excess of bladder capacity or incomplete emptying of the bladder because of lower urinary tract obstruction or detrusor instability.
Synonym(s): nycturia
[noct- + G. ouron, urine]
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