D defs.my
Entry 1 sense Webster, 1913

Dura mater

/do͝or'-ə mät'-ẽr/ · Du·ra ma·ter · IPA /ˈd(j)ʊɹ.ə ˌmeɪ.tɚ/
01 The tough, fibrous membrane, which lines the cavity of the skull and spinal column, and surrounds the brain and spinal cord; -- frequently …
  1. 1.
    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.(Anat.)