adjective Anatomy.
of or pertaining to the hippocampus.

1830–40; hippocamp(us) + -al1

posthippocampal, adjective
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World English Dictionary
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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Example sentences
Serious hippocampal damage means the loss of the ability to form new long-term
The first clues came from people who had suffered hippocampal damage, often as
  a result of brain surgery.
Those unconscious memories don't rely on the hippocampal region to be
  consolidated and stored.
Tank's team studied hippocampal place neurons, which are activated when an
  animal is in a particular location in its environment.
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