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urination |
Also found in: Dictionary/thesaurus, Medical, Wikipedia, Hutchinson | 0.03 sec. |
urinationProcess of excreting urine from the bladder (see urinary system). Nerve centres in the spinal cord, brain stem, and cerebral cortex control it through involuntary and voluntary muscles. The need to void is felt when the bladder holds 3.5–5 oz (100–150 ml) of urine and becomes uncomfortable at a volume of 14–15 oz (350–400 ml). The detrusor contracts and the sphincter (muscular constriction) of the urethra relaxes to empty the bladder. Normally it empties completely, but bladder stones or prostatic disorders can block outflow; poor muscle tone (especially in older women) or certain nervous system disorders can cause loss of control of urination (incontinence). urination [‚yu̇r·ə′nā·shən] (physiology) The discharge of urine from the bladder. Also known as micturition. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| He was detained on suspicion of assault and public urination. 2mg/ 4mg (silodosin), an agent for treating urination disorder associated with benign prostatic hypertrophy (BPH), on May 11. The condition, called benign prostatic hyperplasia (BPH), squeezes the urethra, making urination difficult and frequent. |
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