plural testes
ˈte-ˌstēz 
: a typically paired male reproductive gland that produces sperm and secretes testosterone and that in most mammals is contained within the scrotum at sexual maturity
Examples of testis in a Sentence
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In that April 2025 study, researchers from Germany, Uruguay and Chile observed that Toxoplasma can reach the testes and epididymis, the tube where sperm mature and are stored, two days after infection in mice.
—
Bill Sullivan, The Conversation, 28 May 2025
The festival roared back to life last summer thanks to local restaurant owner Ronna Kehr who picked up the reins and threw a new and improved festival that drew more than 4,000 testes tasters to a town of just 128 residents.
—Lisa Gutierrez, Kansas City Star, 27 May 2025
Historically, doctors have removed the testes—the main source of the hormone—but today, pills and injections can suppress testosterone not just in the testes but in other organs that produce small amounts, such as the adrenal glands, as well.
—Alice Park, Time, 19 May 2025
Research has connected phthalates with reproductive problems, such as genital malformations and undescended testes in baby boys and lower sperm counts and testosterone levels in adult males.
—Sandee Lamotte, CNN Money, 15 Apr. 2025
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Bill Sullivan, The Conversation, 28 May 2025
The festival roared back to life last summer thanks to local restaurant owner Ronna Kehr who picked up the reins and threw a new and improved festival that drew more than 4,000 testes tasters to a town of just 128 residents.
—Lisa Gutierrez, Kansas City Star, 27 May 2025
Historically, doctors have removed the testes—the main source of the hormone—but today, pills and injections can suppress testosterone not just in the testes but in other organs that produce small amounts, such as the adrenal glands, as well.
—Alice Park, Time, 19 May 2025
Research has connected phthalates with reproductive problems, such as genital malformations and undescended testes in baby boys and lower sperm counts and testosterone levels in adult males.
—Sandee Lamotte, CNN Money, 15 Apr. 2025
See All Example Sentences for testis
Cite this Entry
“Testis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/testis. Accessed 8 Jun. 2025.
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Medical Definition
testis
noun
tes·tis
ˈtes-təs
plural testes
ˈtes-ˌtēz
: a typically paired male reproductive gland that usually consists largely of seminiferous tubules from the epithelium of which spermatozoa develop, that contains androgen-secreting Leydig cells in the interstitial tissue, that corresponds to the ovary of the female and in craniate vertebrates develops from the genital ridges of the embryo, and that in most mammals descends into the scrotum before the attainment of sexual maturity and in many cases before birth
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