Definition of hippocampus noun from the Oxford Advanced American Dictionary

 

hippocampus

 noun
noun
NAmE//ˌhɪpəˈkæmpəs//
 
(pl. hippocampi
NAmE//ˌhɪpəˈkæmpaɪ//
 
, NAmE//ˌhɪpəˈkæmpi//
 
)
(anatomy)
 
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either of the two areas of the brain thought to be the center of emotion and memory
See the Oxford Advanced Learner's Dictionary entry: hippocampus