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.
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NAmE//hɔrˈmoʊnl//
adjective [usually before noun] the hormonal changes occurring during pregnancySee hormone in the Oxford Advanced Learner's DictionaryCheck pronunciation: hormone