海かい馬ば回かいMeanings1nounparahippocampal gyrus; hippocampal gyrusanatomy›Anatomical term for a gyrus in the medial temporal lobe, adjacent to the hippocampus. Used in medical and neuroscience contexts.海かい馬ば回かいは記き憶おくや空くう間かん認にん知ちに関かん与よする領りょう域いきです。The parahippocampal gyrus is a region involved in memory and spatial cognition.