NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,777 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

testicle
(TES-tih-kul)
One of two egg-shaped glands inside the scrotum that produce sperm and male hormones. Also called testis.

EnlargeAnatomy of the  male reproductive and urinary systems; drawing shows front and side views of ureters, lymph nodes, rectum, bladder, prostate gland, vas deferens, urethra, penis, testicles, seminal vesicle, and ejaculatory duct.

Anatomy of the male reproductive and urinary systems, showing the testicles, prostate, bladder, and other organs.