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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Many of these cases are linked to variations in a gene called SRY, which is normally responsible for triggering testis formation.
—
Jenny Lehmann, Discover Magazine, 6 June 2025
Evidence that Toxoplasma can also target human male reproductive organs first surfaced during the height of the AIDS pandemic in the 1980s, when some patients presented with the parasitic infection in their testes.
—Bill Sullivan, The Conversation, 28 May 2025
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
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Jenny Lehmann, Discover Magazine, 6 June 2025
Evidence that Toxoplasma can also target human male reproductive organs first surfaced during the height of the AIDS pandemic in the 1980s, when some patients presented with the parasitic infection in their testes.
—Bill Sullivan, The Conversation, 28 May 2025
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
See All Example Sentences for testis
Cite this Entry
“Testis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/testis. Accessed 18 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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