• Either of the paired male reproductive glands that produce the male germ cells and the male hormones.
  NCI Thesaurus
  U.S. National Cancer Institute, 2021
• Lobular organ the parenchyma of which consists of seminiferous tubules which communicate with the duct of the epididymis. Examples: There only two instances, right testis and left testis.
  Digital Anatomist
  University of Washington, 2003
• Male gonad; either of the paired glands normally located in the scrotum; each testis is surround by an outer mesothelial layer and an inner white capsule and is composed of compartments which contain the seminiferous tubules where the spermatozoa are produced; specialized interstital Leydig cells secrete androgens.
  CRISP Thesaurus
  National Institutes of Health, 2006
• The male gonad containing two functional parts: the SEMINIFEROUS TUBULES for the production and transport of male germ cells (SPERMATOGENESIS) and the interstitial compartment containing LEYDIG CELLS that produce ANDROGENS.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2021
• (testicle) One of two egg-shaped glands inside the scrotum that produce sperm and male hormones.
  NCI Dictionary of Cancer Terms
  U.S. National Cancer Institute, 2021
• Testis, in animals, the organ that produces sperm, the male reproductive cell, and androgens, the male hormones. In humans the testes occur as a pair of oval-shaped organs. They are contained within the scrotal sac, which is located directly behind the penis and in front of the anus. In humans each...
  Encyclopedia Britannica
  Encyclopedia Britannica, Inc., 2020