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

  • n. A substance, usually a peptide or steroid, produced by one tissue and conveyed by the bloodstream to another to effect physiological activity, such as growth or metabolism.
  • n. A synthetic compound that acts like a hormone in the body.
  • n. Any of various similar substances found in plants and insects that regulate development.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any substance produced by one tissue and conveyed by the bloodstream to another to effect physiological activity.
  • n. A synthetic compound with the same activity.
  • n. Any similar substance in plants.

from the GNU version of the Collaborative International Dictionary of English

  • n. A chemical substance formed in one organ and carried in the circulation to another organ on which it exerts a specific effect on cells at a distance from the producing cells.
  • n. a chemical substance, whether natural or synthetic, that functions like a hormone in a living organism. .
  • n. A substance that controls growth rate or differentiation in plants; also called phytohormone. The most well-known are the auxins that stimulate growth at the growing tips of plants, and control root formation and the dropping of leaves; and the gibberellins, which are used in agriculture to promote plant growth.

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

  • n. the secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect


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

From Greek hormōn, present participle of hormān, to urge on, from hormē, impulse.

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Ancient Greek ὁρμή (horme, "rapid motion forwards, onrush, onset, assault, impulse to do a thing, effort"), from ὁρμάω (hormao), ὁρμῶ (hormo, "to set in motion, to urge on, to cheer on, to make a start, to hasten on").


  • Doctors previously used the term hormone-replacement therapy (HRT), which carried the connotation that menopausal women were missing something essential.

    The Seattle Times

  • We believe students need a break from what I call "hormone display behavior" which can be exhausting for adolescents.

    Meg Campbell: Laughter, Joy and Friendship in School?

  • However, Jobs took a six-month leave of absence in early 2009 for what he called a "hormone imbalance."

    Apple Co-Founder Steve Jobs Dies at 56

  • This hormone is the ultimate 'feel good' chemical because it is the essence of love, friendship, and tolerance of others.

    yalla - French Word-A-Day

  • Apple executives provided no additional information on the well-being of CEO Steve Jobs, who stepped away from day-to-day operations in January to get treated for what he called a hormone imbalance.


  • Apple's Jobs: Hormone Condition Won't Hinder CEO Duties letter released today, Apple (NASDAQ: AAPL) CEO Steve Jobs sought to dispel some of the persistent rumors surrounding his health -- while admitting that he's recovering from what he described as a hormone imbalance.

    InternetNews Realtime News for IT Managers

  • We know African-Americans are diagnosed at younger ages with what we call hormone-sensitive cancers, like prostate and breast cancer.

    News for WSAV

  • In 2003, Dr. Gershon Ejeckam wrote a series of memos in which he dubbed hormone receptor testing erratic, unreliable and unhelpful.

    The Telegram: National News

  • The new findings indicate the drop in hormone use will probably speed that, Chlebowski and others said.

    Study: Hormones up breast cancer deaths

  • Can certain hormone combinations increase the relative ratios of certain chromosones in sperm and move certain ova ahead in que?

    Dysculturation?, Bryan Caplan | EconLog | Library of Economics and Liberty


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  • Hormone's do speak,

    but since they have no tongue,

    they use yours. --Jan Cox

    November 12, 2007