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Longman Dictionary of Contemporary English
▪ Men in their 60s and 70s often have testosterone levels in the low end of the normal range for young men.
▪ One test showed that when white men from the South were insulted, their testosterone levels rose an average of 12 percent.
▪ The researchers found that when male monkeys compete, their testosterone levels rise.
▪ First of all, the study simply measured total testosterone in the blood of female volunteers.
▪ One of the major functions of the testes is to produce testosterone, the most potent androgen.
▪ Perhaps the secret's in the wrist action - testosterone isn't the only thing that males have to discharge.
▪ The problem for the cockerel is that the higher his level of testosterone, the greater his parasite infestation.
▪ They have injected all kinds of animals at all stages of development with synthetic testosterone to see how it affected their behaviour.
▪ Women usually have a small amount of the male hormone testosterone circulating in their bodies.
▪ Yet they still can not define any specific influence of testosterone on the behaviour of the human male.
The Collaborative International Dictionary

Testosterone \Tes*tos"ter*one\ (t[e^]s*t[o^]s"t[~e]r*[=o]n), n. a steroid hormone ( C19H28O2) produced mostly in the testes, which is responsible for producing the secondary sexual characteristics of males.

Douglas Harper's Etymology Dictionary

male sex hormone, 1935, from German Testosteron (1935), coined from a presumed comb. form of Latin testis "testicle" (see testis) + first syllable of sterol + chemical ending -one.


n. 1 (context steroid hormone English) steroid hormone produced primarily in the testes of the male; it is responsible for the development of secondary sex characteristics in the male. 2 (context figuratively English) Manly behavior, often of an aggressive or foolishly reckless nature.


n. a potent androgenic hormone produced chiefly by the testes; responsible for the development of male secondary sex characteristics


Testosterone is a steroid hormone from the androgen group and is found in humans and other vertebrates. In humans and other mammals, testosterone is secreted primarily by the testicles of males and, to a lesser extent, the ovaries of females. Small amounts are also secreted by the adrenal glands. It is the principal male sex hormone and an anabolic steroid.

In men, testosterone plays a key role in the development of male reproductive tissues such as the testis and prostate, as well as promoting secondary sexual characteristics such as increased muscle and bone mass, and the growth of body hair. In addition, testosterone is essential for health and well-being, and for the prevention of osteoporosis.

On average, in adult males, levels of testosterone are about 7–8 times as great as in adult females. As the metabolic consumption of testosterone in males is greater, the daily production is about 20 times greater in men. Females are also more sensitive to the hormone. Testosterone is observed in most vertebrates. Fish make a slightly different form called 11-ketotestosterone. Its counterpart in insects is ecdysone. These ubiquitous steroids suggest that sex hormones have an ancient evolutionary history.

Testosterone is on the WHO Model List of Essential Medicines, the most important medications needed in a basic health system.

Testosterone (patch)

The testosterone patch, brand name Intrinsa among others, was designed to treat female sexual dysfunction.

Testosterone (film)

Testosterone (2003) is a film adaption from James Robert Baker's novel Testosterone. The film is directed by David Moreton and stars David Sutcliffe, Antonio Sabato, Jr., and Jennifer Coolidge.

Testosterone (2004 film)

Testosterone (/Testosteroni) is a Greek film directed by Giorgos Panousopoulos. It released in 2004 and it stars Dimitris Liakopoulos, Natalia Dragoumi, Dimitra Matsouka and others. The film won the third best film award and the award of the best leading actor in the Greek State Film Awards. The film was shot in Naxos.

Usage examples of "testosterone".

Estrogens and progesterone are just part of a complex and closely interlinked hormonal system that includes many other hormones, including testosterone, DHEA, pregnenolone, and melatonin, to name just a few.

For example, prostate cancer tumors grow in the presence of the hormone dihydrotestosterone, which is formed from testosterone.

He had received the results of the endocrinological tests performed at Henry Ford Hospital, and so knew of my XY karyotype, my high plasma testosterone levels, and the absence in my blood of dihydrotestosterone.

When estrogen levels begin to drop during perimenopause, testosterone appears to be able to pick up part of the slack.

I had succeeded in developing a testosterone formulation I judged would be effective on humans, and I had converted the liquid into pills not much larger than a 325 mg aspirin.

I left the Conclusions section blank until I had tested the testosterone pills hidden in my study at home.

You hand over a few testosterone pills to us, and the boy walks away unhurt.

The smell of sheetrock and semi-gloss, of grout, spackle, sweat, and testosterone, reminded me of home.

It might he testosterone formulation be possible to structure transdermal delivery.

A lot of bodybuilders shooting too much testosterone would get what they called bitch tits.

If during its development a young animal is deprived of key hormones - thyroid hormone, or oestrogen or testosterone - the nervous connections in parts of its brain grow characteristically askew.

The 400 milligrams of Deca-Durabolin and testosterone cypionate you just spiked backstage is still a round little bolus in the skin on your ass.

I was definitely feeling the effects of castration and most certainly felt better all the time without testosterone.

Massive doses of testosterone had accentuated her masculine characteristics.

This ties in with their theory that human sexual selection is based on choosing mates whose appearance shows averageness plus symmetry, modified by those features exaggerated by testosterone in men and estrogen in women.