dura-mater
n. மூளையம் முதுகுத் தண்டையும் சூழ்ந்துகொண்டிருக்கும் உறுதியான மேல் சவ்வு.
Du"ra ma"ter. Etym: [L., lit., hard mother. The membrane was called mater, or mother, because it was formerly thought to give rise to every membrane of the body.] (Anat.) Defn: The tough, fibrous membrane, which lines the cavity of the skull and spinal column, and surrounds the brain and spinal cord; -- frequently abbreviated to dura.