Definition of hormone noun from the Oxford Advanced American Dictionary

 

hormone

 noun
noun
NAmE//ˈhɔrmoʊn//
 
 
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a chemical substance produced in the body or in a plant that encourages growth or influences how the cells and tissues function; an artificial substance that has similar effects growth hormones a hormone imbalance Estrogen is a female sex hormone.
NAmE//hɔrˈmoʊnl//
 
adjective [usually before noun] the hormonal changes occurring during pregnancy
See the Oxford Advanced Learner's Dictionary entry: hormone

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