A common mis-spelling of the word testicles.

The testicles, known medically as testes (singular testis), are the male generative glands in animals. Male mammals have two testicles, contained within an extension of the abdomen called the scrotum.

Between the seminiferous tubules are special cells called interstitial cells (Leydig cells) where testosterone and other androgens are formed.


Like the ovaries (to which they are homologous), testicles are components of both the reproductive system (being gonads) and the endocrine system (being endocrine glands). The respective functions of the testicles are:

- producing sperm (spermatozoa)

- producing male sex hormones, of which testosterone is the best known

Both functions of the testicle, sperm-forming and endocrine, are under control of gonadotropic hormones produced by the anterior pituitary:

- luteinizing hormone (LH)

- follicle-stimulating hormone (FSH)


Under a tough fibrous shell, the tunica albuginea, the testis contains very fine coiled tubes called the seminiferous tubules. The tubes are lined with a layer of cells that, from puberty into old-age, produce sperm cells. The seminiferous tubules lead to the epididymis, where newly created sperm cells mature, and then into vas deferens (also called the ductus deferens) which opens into the urethra. Upon any sufficient sexual arousal, the sperm cells move through the ejaculatory duct and into the prostatic urethra, where the prostate, through muscular contractions, ejaculates the sperm, mixed with other fluids, out through the penis. (The genital anatomy described here, along with the neuroanatomy and hormonal systems that enable it to perform ejaculation, have as primary evolutionary functions the impregnation of a fertile female of the same species (or a sufficiently close one), via sexual intercourse with her.)

Health issues

The testicles are well-known to be very sensitive to impact and injury. This has been a rich source of humor for jokes and comedic routines. Slang terms for testicles, like "balls" or the Spanish "cojones" are often used in everyday speech to denote courage or audacity, as in "He has balls to do that."

The most important diseases of testicles are:

- inflammation of the testicles, called orchitis

- testicular cancer and other neoplasms

- accumulation of clear fluid around a testicle, called hydrocele testis

- inflammation of the epididymis, called epididymitis

- spermatic cord torsion also called testicular torsion

- varicocele 1 - swollen vein to the testes, usually affecting the left testicle

The removal of one or both testicles is termed

- orchidectomy, in medicine (where orchiectomy and orchectomy are synonymous), and

- castration in general use, especially when done for the benefit of others than the subject, for example, to produce a high-voiced castrato from the castration of a pre-pubescent boy

At least for humans, testicular prostheses are available to mimic the appearance and feel of one or both testicles, when absent as from injury or medical treatment.
by Dr. Know April 7, 2005
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Testicules is the communal drinking vessel on long camping trips, usually used to store other forms of food prior to use as a fluid reservoir and is usually in the shape of an animal. Primary liquids dispensed by Testicules are Tang and Kool-Aid.

The most common container to be converted to Testicules is the Army-Sized Animal Cracker plastic bear. Also, the only way to have a true Testicules is to consume the crackers from the bear before filling with liquid, none can be thrown away.

The origin of Testicules is unknown, but is rumored to have started as a sort of rite of passage among young teens.
"Drink from Testicules!"

by Rockin! June 13, 2007
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Waving your arms around and talking total bollocks. Ideal for use when managers/advertising types/tv producers start spiralling out of control.
Stop testiculating and give me a straight answer, if you can.
by Martin Peake May 24, 2005
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The art of talking complete bollocks whilst waving your arms around like a madman.
Politicians regularly practise testiculation right before elections ..
by revenge_iz_sweet June 28, 2006
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That girl was a big time tease that when I came back home I was in pain from the testiculitis
by joshwua915 November 29, 2016
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Wildly gesticulating while lying through your teeth.
"Lance Armstrong's testiculation of his blood-doping and drug-use was wildly reported by the media"
by BadPauly October 18, 2012
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\tuh-STIK-yuh-layt\, intransitive verb:
1. To make gestures or motions with one's genitals, especially while speaking or instead of speaking

transitive verb:
1. To indicate or express by gestures with one's testicles.
As a paraplegic with limited motor skills, Jim couldn't use his hands to emphasize his speech, so instead he had to testiculate. This often led to him getting arrested for public indecency, although every woman he was ever with was never unsatisfied.
by Zigfried November 13, 2007
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