hippocampus

noun2

1. •
   A part of the brain located inside the temporal lobe, consisting mainly of grey matter. It is a component of the limbic system and plays a role in memory and emotion.

   • The hippocampus is central to the laying down of memories. — 2019
2. •
   A mythological creature with the front head and forelimbs of a horse and the rear of a fish.