hypothalamus

noun
hy·​po·​thal·​a·​mus | \ˌhī-pō-ˈtha-lə-məs \

Definition of hypothalamus 

: a basal part of the diencephalon that lies beneath the thalamus on each side, forms the floor of the third ventricle, and includes vital autonomic regulatory centers

Examples of hypothalamus in a Sentence

Recent Examples on the Web

The hypothalamus helps regulate a number of important behavioral and physiological functions such as body temperature, eating and drinking habits, emotional well-being and sleep, according to the National Institute of General Medical Sciences. Mark Lieber, CNN, "Maintaining a daily rhythm is important for mental health, study suggests," 15 May 2018 Normally, your brain’s hypothalamus releases GnRH, which stimulates your pituitary gland to let loose some FSH and LH. Korin Miller, SELF, "How Long Does a Period Last, Normally?," 17 May 2018 Many can interfere with the activity of the hypothalamus, a part of the brain that helps regulate temperature and thirst. Avichai Scher /, NBC News, "Here's a surprising extreme heat risk for 1 in 6 Americans," 28 June 2018 This produces a stress response in your body—specifically, your brain’s hypothalamus triggers your sympathetic nervous system to release norepinephrine (aka adrenaline) and cortisol (a stress hormone) to get you out of harm’s way. Brittany Risher, SELF, "This Is When to See a Mental Health Professional About Your Anxiety," 2 Feb. 2018 Studies in both animals and humans showed that CGRP and its receptors are found in brain structures such as the hypothalamus and cerebellum, which were long thought to play a role in generating migraine attacks. R. Allan Purdy, Scientific American, "Can Anything Stop My Migraine?," 1 May 2017 Daily circadian rhythm is controlled by a collection of neurons in an area of the brain called the hypothalamus. Mark Lieber, CNN, "Maintaining a daily rhythm is important for mental health, study suggests," 15 May 2018 The hypothalamus may continue to secrete hormones, for example. The Economist, "When death is not the end," 26 Apr. 2018 Essentially, the brain’s hypothalamus produces gonadotropin-releasing hormone, which causes the pituitary gland to produce FSH and LH. Sarah Jacoby, SELF, "Hold On Everyone, Male Birth Control Still Isn't Happening Anytime Soon," 22 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hypothalamus.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of hypothalamus

1896, in the meaning defined above

History and Etymology for hypothalamus

New Latin

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The first known use of hypothalamus was in 1896

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More Definitions for hypothalamus

hypothalamus

noun
hy·​po·​thal·​a·​mus | \-ˈthal-ə-məs \
plural hypothalami\ -​ˌmī \

Medical Definition of hypothalamus 

: a basal part of the diencephalon that lies beneath the thalamus on each side, forms the floor of the third ventricle, and includes vital autonomic regulatory centers (as for the control of food intake)

More from Merriam-Webster on hypothalamus

Nglish: Translation of hypothalamus for Spanish Speakers

Britannica.com: Encyclopedia article about hypothalamus

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