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

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Joseph and a team of technicians found that Honnold’s amygdala showed little activity in reaction to images that would typically trigger fear and stress reactions. Angelica Stabile, FOXNews.com, 30 Jan. 2026 Honnold, who has been a pro solo climber for 30 years and who has also made headlines for his remarkably unresponsive amygdala, said the point of the spectacle is its inherent danger. Natalie Oganesyan, Deadline, 18 Jan. 2026 The amygdala becomes hypervigilant. Rabbi Bruce D. Forman, Sun Sentinel, 13 Jan. 2026 One striking finding is altruistic kidney donors tend to have a larger amygdala, a part of the brain critical to processing emotions. Cristina Quinn, Washington Post, 8 Jan. 2026 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 4 Feb. 2026.

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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