: 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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Two of the main brain structures scientists believe are involved in storing traumatic memories are the hippocampus—responsible for memory storage—and the amygdala, which is responsible for processing emotions. Michele Patterson Ford, Scientific American, 22 Aug. 2026 The more acupuncture sessions people did, the greater the change in an area of the brain called the left amygdala region, which is important for emotional processing. Korin Miller, Allure, 21 Aug. 2026 During trauma, the amygdala becomes highly active, processing emotions such as fear, and the hippocampus becomes overwhelmed by stress, leading to problems with memory storage. Michele Patterson Ford, The Conversation, 19 Aug. 2026 And so there does appear to be an emotional network in the brain — areas like the amygdala, the anterior cingulate cortex, insular cortex, and some other areas that seem to confer an emotional component of pain. Quanta Magazine, 6 Aug. 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 25 Aug. 2026.

Medical Definition

: 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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