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 moments of conflict, the amygdala — the brain’s alarm system — goes on high alert. Mark Travers, Forbes.com, 14 July 2025 The olfactory cortex is closely connected to the amygdala, a part of the brain that processes emotions, and to the hippocampus, a key region for memory. Margaret Talbot, New Yorker, 10 July 2025 At a minimum, says Rincon-Torroella, a memory-altering chip would have to target the hippocampi, for their memory-forming function, and the amygdala, which governs emotions. Jeffrey Kluger, TIME, 20 Mar. 2025 The key to a mindset that welcomes feedback is to extract a positive element from the negative feedback, allowing the brain’s activity to shift from the amygdala to the frontal lobes. Expert Panel®, Forbes.com, 27 June 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 19 Jul. 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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