hypothalamus

noun

hy·​po·​thal·​a·​mus ˌhī-pō-ˈtha-lə-məs How to pronounce hypothalamus (audio)
: 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
An Unexpected Brain Target The research didn’t begin with the lateral hypothalamus in mind. IEEE Spectrum, 8 Dec. 2024 The lateral hypothalamus is more closely associated with feeding, energy intake and reward behavior. Michael Irving, New Atlas, 8 Dec. 2024 During a migraine attack, the hypothalamus is thought to lose control over a collection of structures in the brain called the limbic system, which affects how a person responds to pain. Helen Thomson, WIRED, 25 Sep. 2024 Summary Vasopressin is a hormone that the hypothalamus produces and the pituitary gland secretes. James Myhre & Dennis Sifris, Md, Verywell Health, 24 Sep. 2024 See all Example Sentences for hypothalamus 

Word History

Etymology

borrowed from New Latin (in a German context), from hypo- hypo- + thalamus thalamus

Note: The term was introduced in an article by the Swiss-born anatomist Wilhelm His (1831-1904), "Ueber das frontale Ende des Gehirnrohres," Archiv für Anatomie und Physiologie: Anatomische Abtheilung, Jahrgang 1893, p. 159. His attributes the suggestion of the word to his colleague "Waldeyer" (the anatomist Heinrich Wilhelm Gottfried von Waldeyer-Hartz, 1836-1921), as a replacement for his own coinage Regio subthalamica.

First Known Use

1896, in the meaning defined above

Time Traveler
The first known use of hypothalamus was in 1896

Dictionary Entries Near hypothalamus

Cite this Entry

“Hypothalamus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hypothalamus. Accessed 25 Dec. 2024.

Kids Definition

hypothalamus

noun
hy·​po·​thal·​a·​mus ˌhī-pō-ˈthal-ə-məs How to pronounce hypothalamus (audio)
: a part of the brain that lies beneath the thalamus, produces hormones which pass to the front part of the pituitary gland, and is important in regulating the activities of the autonomic nervous system

Medical Definition

hypothalamus

noun
hy·​po·​thal·​a·​mus -ˈthal-ə-məs How to pronounce hypothalamus (audio)
plural hypothalami -ˌmī How to pronounce hypothalamus (audio)
: 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)

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