noun, plural hippocampi [hip-uh-kam-pahy, -pee] .
Classical Mythology. a sea horse with two forefeet, and a body ending in the tail of a dolphin or fish.
Anatomy. an enfolding of cerebral cortex into the lateral fissure of a cerebral hemisphere, having the shape in cross section of a sea horse.

1600–10; < Latin < Greek hippókampos, equivalent to hippo- hippo- + kámpos sea monster

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hippocampus (ˌhɪpəʊˈkæmpəs)
n , pl -pi
1.  a mythological sea creature with the forelegs of a horse and the tail of a fish
2.  See sea horse any marine teleost fish of the genus Hippocampus, having a horselike head
3.  an area of cerebral cortex that forms a ridge in the floor of the lateral ventricle of the brain, which in cross section has the shape of a sea horse. It functions as part of the limbic system
[C16: from Latin, from Greek hippos horse + kampos a sea monster]

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Medical Dictionary

hippocampus hip·po·cam·pus (hĭp'ə-kām'pəs)
n. pl hip·po·cam·pi (-pī')
The complex, internally convoluted structure that forms the medial margin of the cortical mantle of the cerebral hemisphere, borders the choroid fissure of the lateral ventricle, is composed of two gyri with their white matter, and forms part of the limbic system.

hip'po·cam'pal (-pəl) adj.
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Science Dictionary
hippocampus   (hĭp'ə-kām'pəs)  Pronunciation Key 
Plural hippocampi (hĭp'ə-kām'pī')
A convoluted, seahorse-shaped structure in the cerebral cortex of the temporal lobe of the brain, composed of two gyri with white matter above gray matter. It forms part of the limbic system and is involved in the processing of emotions and memory.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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