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urethra

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u⋅re⋅thra

[yoo-ree-thruh]
–noun, plural -thrae [-three] , -thras. Anatomy.
the membranous tube that extends from the urinary bladder to the exterior and that in the male conveys semen as well as urine.

Origin:
1625–35; < LL < Gk ourthra, equiv. to ourē- (see ureter ) + -thra n. suffix


u⋅re⋅thral, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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u·re·thra   (yŏŏ-rē'thrə)   
n.   pl. u·re·thras or u·re·thrae (-thrē)
The canal through which urine is discharged from the bladder in most mammals and through which semen is discharged in the male.

[Late Latin ūrēthra, from Greek ourēthra, from ourein, to urinate.]
u·re'thral adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: ure·thra
Pronunciation: yu-'rE-thr&
Function: noun
Inflected Form: plural ure·thras or ure·thrae /-(")thrE/
: the canal that in most mammals carries off the urine from the bladder and in the male serves also as a genital duct —ure·thral /-thr&l/ adjective
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

urethra u·re·thra (y&oobreve;-rē'thrə)
n. pl. u·re·thras or u·re·thrae (-thrē)
The canal through which urine is discharged from the bladder in most mammals and through which semen is discharged in the male. Also called urogenital canal.


u·re'thral adj.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
urethra   (y-rē'thrə)  Pronunciation Key 
Plural urethras or urethrae (y-rē'thrē)
The duct through which urine passes from the bladder to the outside of the body in most mammals and some fish and birds. In males, the urethra passes through the penis and also serves as the duct for the release of sperm, which enter the urethra from the vas deferens.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia

urethra

duct that transmits urine from the bladder to the exterior of the body during urination. The urethra is held closed by the urethral sphincter, a muscular structure that helps keep urine in the bladder until voiding can occur.

Learn more about urethra with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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