/hip'euh kam"peuhs/ , n. , pl. hippocampi /-puy, -pee/ .
1. Class. Myth. a sea horse with two forefeet, and a body ending in the tail of a dolphin or fish.
2. Anat. 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; hippókampos, equiv. to hippo- HIPPO- + kámpos sea monster ]