海马体 hǎimǎtǐ hippocampus Definitions Defs Origin Strokes Stroke Words Sentences Sents 海马 海馬 hǎimǎ hippocampus A part of the brain involved in memory and navigation; often used as an abbreviation for 海马体 hǎimǎtǐ.体 體 tǐ noun form (bound form) the form, state, or shape of a substance, such as a solid or liquid; the configuration or structure of an object