amygdala

noun

amyg·​da·​la ə-ˈmig-də-lə How to pronounce amygdala (audio)
plural amygdalae ə-ˈmig-də-ˌlē How to pronounce amygdala (audio)
-ˌlī
: the one of the four basal ganglia in each cerebral hemisphere that is part of the limbic system and consists of an almond-shaped mass of gray matter in the anterior extremity of the temporal lobe

called also amygdaloid nucleus

Examples of amygdala in a Sentence

Recent Examples on the Web
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In the face of a threat, the amygdala sends out a distress signal that activates the sympathetic nervous system and sends adrenaline surging through your body. Shani Harmon, Forbes, 23 Jan. 2025 In the amygdala, calcium-dependent SK2 channels help regulate neuronal activity. Jenny Lehmann, Discover Magazine, 7 Feb. 2025 When people are feeling anxious, scared, or angry, the principles of tapping theorize that the practice calms the amygdala, the part of the brain that controls those emotions. Mankaprr Conteh, Rolling Stone, 25 Jan. 2025 When faced with uncertainty, the amygdala—the part of the brain responsible for detecting threats—triggers a fight-or-flight response. Tess Brigham, Forbes, 20 Jan. 2025 See All Example Sentences for amygdala

Word History

Etymology

New Latin, from Latin, almond, from Greek amygdalē

First Known Use

1845, in the meaning defined above

Time Traveler
The first known use of amygdala was in 1845

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Cite this Entry

“Amygdala.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/amygdala. Accessed 1 Mar. 2025.

Medical Definition

amygdala

noun
amyg·​da·​la ə-ˈmig-də-lə How to pronounce amygdala (audio)
plural amygdalae -ˌlē How to pronounce amygdala (audio) -ˌlī How to pronounce amygdala (audio)
: the one of the four basal ganglia in each cerebral hemisphere that is part of the limbic system and consists of an almond-shaped mass of gray matter in the roof of the lateral ventricle

called also amygdaloid body, amygdaloid nucleus

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