In anatomy, a thin layer of gray matter in the brain; in historical use, an enclosed space like a monastery or cloister.
Latin for 'enclosed space' or 'lock,' from claudere (to close). The anatomical term was applied by neuroscientists to this brain structure because of its compartmentalized appearance.
The claustrum in your brain is one of the most mysterious structures—scientists still don't fully understand what it does, but it might be your brain's 'attention director,' filtering what you notice moment to moment.
Complete word intelligence in one call. Free tier — 50 lookups/day.