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Definition of "testis" [tes•tis]

  • The reproductive gland in a male vertebrate, the source of spermatozoa and the androgens, normally occurring paired in an external scrotum in humans and certain other mammals. (noun)
  • An analogous gland in an invertebrate animal, such as a hydra or a mollusk. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "testis" in a sentence
  • "The receptors are everywhere, but the testis is exquisitely sensitive to the drug."
  • "From my own observations, I am led to believe that no such muscular structure as a gubernaculum exists, and therefore that the descent of the testis is the effect of another cause."
  • "The one above the testis is the plica vascularis, and contains ultimately the internal spermatic vessels; the one below, the plica gubernatrix, contains the lower part of the gubernaculum, which has now grown into a thick cord; it ends below at the abdominal inguinal ring in a tube of peritoneum, the saccus vaginalis, which protrudes itself down the inguinal canal."