intrathecal

intrathecal
1. Within a sheath. 2. Within either the subarachnoid or the subdural space.

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in·tra·the·cal -'thē-kəl adj introduced into or occurring in the space under the arachnoid membrane of the brain or spinal cord <\intrathecal chemotherapy and cranial irradiation (Jour. Amer. Med. Assoc.)>
in·tra·the·cal·ly -kə-lē adv

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adj.
1. within the meninges of the spinal cord. An intrathecal injection is made into the meninges.
2. within a sheath, e.g. a nerve sheath.

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in·tra·the·cal (in″trə-theґkəl) within a sheath; see also under injection.

Medical dictionary. 2011.

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