hippocampus

noun

hip·​po·​cam·​pus ˌhi-pə-ˈkam-pəs How to pronounce hippocampus (audio)
plural hippocampi ˌhi-pə-ˈkam-ˌpī How to pronounce hippocampus (audio)
-(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
hippocampal adjective

Examples of hippocampus in a Sentence

Recent Examples on the Web Blackouts occur when alcohol interferes with receptors of the hippocampus that aid in memory consolidation, rendering the drinker incapable of making and storing new memories. Jessica Winter, The New Yorker, 1 July 2024 Share [Findings] Scientists trained subjects to exercise control over a single neuron, linked the hippocampus to regret, and concluded that humans smell in stereo. Rafil Kroll-Zaidi, Harper's Magazine, 19 June 2024 In early Alzheimer’s stages, the hippocampus loses tissue rapidly and then atrophies as the disease progresses. Sandee Lamotte, CNN, 18 June 2024 But one of the most compelling pieces of evidence for memory, in particular, is a study that found aerobic exercise can increase the size of the hippocampus (a key part of your brain involved in memory and learning) by up to 2%, staving off a meaningful chunk of the shrinkage that happens with age. Erica Sloan, SELF, 17 June 2024 See all Example Sentences for hippocampus 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'hippocampus.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

New Latin, from Greek hippokampos seahorse, from hippos horse + kampos sea monster — more at equine

First Known Use

1695, in the meaning defined above

Time Traveler
The first known use of hippocampus was in 1695

Dictionary Entries Near hippocampus

Cite this Entry

“Hippocampus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hippocampus. Accessed 15 Jul. 2024.

Medical Definition

hippocampus

noun
hip·​po·​cam·​pus ˌhip-ə-ˈkam-pəs How to pronounce hippocampus (audio)
plural hippocampi -ˌpī How to pronounce hippocampus (audio) -(ˌ)pē How to pronounce hippocampus (audio)
: 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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