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hypothalamus

noun [S]
 
 
/ˌhaɪ.pəʊˈθæl.ə.məs/ US  /-poʊˈ-/ specialized

Definition

a small part in the brain that controls things such as body temperature and the release of hormones, that is below the thalamusThe brain and nervous system
(Definition of hypothalamus noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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