Definition of intrathecal
:introduced into or occurring in the space under the arachnoid membrane of the brain or spinal cord
- intrathecal drugs
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First Known Use of intrathecal
1887
Medical Dictionary
medical Definition of intrathecal
:introduced into or occurring in the space under the arachnoid membrane of the brain or spinal cord
- intrathecal chemotherapy and cranial irradiation
- —Journal of the American Medical Association
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