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Webster's 1913 Dictionary

CLAUSTRUM

Claus "trum, n.; pl. Claustra. Etym: [L., a bolt or bar. ] (Anat. )

 

Defn: A thin lamina of gray matter in each cerebral hemiphere of the brain of man. -- Claus "tral, a.

 

New American Oxford Dictionary

claustrum

claus trum |ˈklôstrəm, ˈkloustrəm ˈklɔstrəm | ▶noun ( pl. claustra |-trə | ) Anatomy a thin layer of gray matter in each cerebral hemisphere between the lentiform nucleus and the insula. ORIGIN mid 19th cent.: Latin.

 

Oxford Dictionary

claustrum

claustrum |ˈklɔːstrəm | ▶noun ( pl. claustra ) Anatomy a thin layer of grey matter in each cerebral hemisphere between the lentiform nucleus and the insula. ORIGIN mid 19th cent.: Latin, literally ‘lock, enclosed place ’.