hormone

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Noun[change]

Singular
hormone

Plural
hormones

  1. A hormone is a chemical in the human body that causes changes in the body or the brain.
    When we get upset, our brains send out stress hormones. Sometimes these only make us more stressed.
    Sometimes, during pregnancy, hormones' will make women want to eat very strange things, like pickles and ice cream.
  2. Sex hormones help children develop into adults after puberty.
    My 16-year-old nephew has raging hormones! All he can think about is girls!