hippocampus
noun
hip·po·cam·pus
ˌhi-pə-ˈkam-pəs 
plural hippocampi
ˌhi-pə-ˈkam-ˌpī
-(ˌ)pē
-(ˌ)pē
: a curved elongated ridge that extends over the floor of the descending horn of each lateral ventricle of the brain, that consists of gray matter covered on the ventricular surface with white matter, and that is involved in forming, storing, and processing memory
Examples of hippocampus in a Sentence
Recent Examples on the Web
This was especially so in the cortex, the right subiculum (a part of the hippocampus), the anterior cingulate and insular cortices.
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New Atlas, 26 June 2025
Healthy Eating and Slimmer Waists Tied to Better Brain Health
Jensen and her team found that higher diet quality in midlife and into older age was associated with better structural and functional connectivity of the hippocampus and better white matter integrity.
—Tom Gavin, EverydayHealth.com, 24 Mar. 2025
Instead of memory being a province of the hippocampus along with a few other regions, as is commonly believed, Baldassano’s research suggested that memory formation involves collaboration among many brain regions.
—Quanta Magazine, 21 Feb. 2025
Smell signals travel from the nose to the amygdala, the brain’s emotional center, and the hippocampus, its memory hub, on a short pathway only a few synapses long.
—Yasemin Saplakoglu, Quanta Magazine, 3 July 2025
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New Atlas, 26 June 2025
Healthy Eating and Slimmer Waists Tied to Better Brain Health
Jensen and her team found that higher diet quality in midlife and into older age was associated with better structural and functional connectivity of the hippocampus and better white matter integrity.
—Tom Gavin, EverydayHealth.com, 24 Mar. 2025
Instead of memory being a province of the hippocampus along with a few other regions, as is commonly believed, Baldassano’s research suggested that memory formation involves collaboration among many brain regions.
—Quanta Magazine, 21 Feb. 2025
Smell signals travel from the nose to the amygdala, the brain’s emotional center, and the hippocampus, its memory hub, on a short pathway only a few synapses long.
—Yasemin Saplakoglu, Quanta Magazine, 3 July 2025
See All Example Sentences for hippocampus
Cite this Entry
“Hippocampus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hippocampus. Accessed 29 Jul. 2025.
Copy CitationMedical Definition
hippocampus
noun
hip·po·cam·pus
ˌhip-ə-ˈkam-pəs
: a curved elongated ridge that is an important part of the limbic system, extends over the floor of the descending horn of each lateral ventricle of the brain, consists of gray matter covered on the ventricular surface with white matter, and is involved in forming, storing, and processing memory see pes hippocampi
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