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Definition of Tenesmus

Tenesmus: Straining to defecate or urinate. Tenesmus refers especially to ineffectual and painful straining for an extended time. Straining to defecate is called rectal tenesmus; straining to urinate is called vesical tenesmus.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=11432
Last Editorial Review: 3/19/2012

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