Definition of hormone in English:


Line breaks: hor|mone
Pronunciation: /ˈhɔːməʊn


  • 1A regulatory substance produced in an organism and transported in tissue fluids such as blood or sap to stimulate specific cells or tissues into action.
    More example sentences
    • These gonadotropins in turn stimulate synthesis of steroid hormones in target tissues.
    • The gene altered in the giant rats makes the protein Leptin, a hormone released by fat cells as an appetite regulator.
    • Insulin is the hormone which keeps blood sugar levels within the normal healthy range.
  • 1.1A synthetic substance with a similar effect to that of an animal or plant hormone.
    More example sentences
    • The synthetic hormones have side effects, especially liver qi stagnation and blood stagnation.
    • Anabolic steroids are synthetic hormones that cause the body to produce muscle and prevent muscle breakdown.
    • The basic hormone on which all synthetic anabolic steroids are based.
  • 1.2 (hormones) A person’s sex hormones as held to influence behaviour or mood: she told herself she was suffering from hormones, that she would cheer up soon
    More example sentences
    • And how can you trust your teenage opinion of people, when those opinions were being formed via rampaging hormones and juvenile mood swings?
    • It may have been his hormones which improved his mood, as I watched him check her out constantly.
    • Follow these steps to keep your hormones in balance - and your hormone-induced mood swings to a minimum.


early 20th century: from Greek hormōn, present participle of horman 'impel, set in motion'.

More definitions of hormone

Definition of hormone in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day skosh
Pronunciation: skəʊʃ
a small amount; a little