Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A white crystalline steroid hormone, C19H28O2, produced primarily in the testes and responsible for the development and maintenance of male secondary sex characteristics.
  • noun Any of several synthetic compounds that mimic the physiologic activity of testosterone, used as a drug in medical treatment and a doping agent by athletes.

from the GNU version of the Collaborative International Dictionary of English.

  • noun a steroid hormone (C19H28O2) produced mostly in the testes, which is responsible for producing the secondary sexual characteristics of males.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun biochemistry Steroid hormone produced primarily in the testes of the male; it is responsible for the development of secondary sex characteristics in the male.
  • noun figuratively Manly behavior, often of an aggressive or foolishly reckless nature.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

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

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[test(is) + ster(ol) + –one.]

Examples

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