vas deferens

noun
vas def·​er·​ens | \ ˈvas-ˈde-fə-rənz How to pronounce vas deferens (audio) , -ˌrenz \
plural vasa deferentia\ ˈvā-​zə-​ˌde-​fə-​ˈren(t)-​sh(ē-​)ə How to pronounce vas deferens (audio) \

Definition of vas deferens

: a sperm-carrying duct especially of a higher vertebrate that in the human male is a thick-walled tube about two feet (0.61 meters) long that begins at and is continuous with the tail of the epididymis and eventually joins the duct of the seminal vesicle to form the ejaculatory duct

Examples of vas deferens in a Sentence

Recent Examples on the Web One form of male sterilization that is better known than the rest is the vasectomy, a procedure which blocks the vas deferens, the tubes that carry sperm during ejaculation. Justin Ray, Los Angeles Times, 21 Dec. 2021 During a vasectomy, doctors cut or block the vas deferens, one of two tubes in the scrotum that carries sperm from the testes to the urethra, in two places. Dara T. Mathis, SELF, 29 Aug. 2019 Men also have the option of a vasectomy, which involves cutting the vas deferens to prevent semen from making it from the testicles to the prostate. Sarah Jacoby, SELF, 22 Mar. 2018 The idea, discovered by biomedical engineer Sujoy Guha of the Indian Institute of Technology, involves injecting a polymer gel into the vas deferens to block sperm, rather than cutting or tying the vas (a vasectomy). Julia Belluz, Vox, 4 May 2018 Other forms of male birth control in the works include a topical gel, a gel injected into the vas deferens that mimics the effects of a vasectomy, and an injectable hormone combination. Sarah Jacoby, SELF, 22 Mar. 2018 Vasalgel is a polymer that is injected into the vas deferens, which transports sperm to the ejaculatory ducts. Hannah Flynn, Ars Technica, 28 Feb. 2018 The injection requires only one incision to reach the vas deferens, and can be done easily as an outpatient procedure. Ben Panko, Smithsonian, 8 Feb. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'vas deferens.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of vas deferens

1578, in the meaning defined above

History and Etymology for vas deferens

borrowed from New Latin vās deferens, literally, "downward-conveying vessel"

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Time Traveler for vas deferens

Time Traveler

The first known use of vas deferens was in 1578

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Dictionary Entries Near vas deferens

vasculum

vas deferens

vase

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Statistics for vas deferens

Last Updated

31 Dec 2021

Cite this Entry

“Vas deferens.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vas%20deferens. Accessed 19 Jan. 2022.

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More Definitions for vas deferens

vas deferens

noun
vas def·​er·​ens | \ -ˈdef-ə-rənz, -ˌrenz How to pronounce vas deferens (audio) \
plural vasa deferentia\ -​ˌdef-​ə-​ˈren-​ch(ē-​)ə How to pronounce vas deferens (audio) \

Medical Definition of vas deferens

: a sperm-carrying duct especially of a higher vertebrate that in humans is a small but thick-walled tube about two feet (0.6 meter) long formed by the union of the vasa efferentia, is greatly convoluted in its proximal portion, begins at and is continuous with the tail of the epididymis, runs in the spermatic cord through the inguinal canal, and descends into the pelvis where it joins the duct of the seminal vesicle to form the ejaculatory duct

called also ductus deferens, spermatic duct

More from Merriam-Webster on vas deferens

Britannica.com: Encyclopedia article about vas deferens

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