pituitary gland - definition and synonyms

noun [countable] medical 

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/pɪˈtjuːɪt(ə)ri ˌɡlænd/
singularpituitary gland
pluralpituitary glands
  1. the small organ at the base of your brain that produces the substances your body needs to control its growth and development. The pituitary gland is often simply called the pituitary.