[ ˌhɪpə(ʊ)'kampəs ]
■ noun ( plural hippocampi -pi , -pʌɪ ) Anatomy the system of elongated ridges on the floor of the lateral ventricles of the brain, thought to be the centre of emotion, memory, and the autonomic nervous system.
Origin
C16: via L. from Gk hippokampos , from hippos 'horse' + kampos 'sea monster'.