intrathecal

adjective

in·​tra·​the·​cal ˌin-trə-ˈthē-kəl How to pronounce intrathecal (audio)
-(ˌ)trä-
: introduced into or occurring in the space under the arachnoid membrane of the brain or spinal cord
intrathecal drugs
intrathecally adverb

Word History

First Known Use

1887, in the meaning defined above

Time Traveler
The first known use of intrathecal was in 1887

Dictionary Entries Near intrathecal

Cite this Entry

“Intrathecal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/intrathecal. Accessed 22 Sep. 2023.

Medical Definition

intrathecal

adjective
in·​tra·​the·​cal -ˈthē-kəl How to pronounce intrathecal (audio)
: introduced into or occurring in the space under the arachnoid membrane of the brain or spinal cord
intrathecal chemotherapy and cranial irradiationJournal of the American Medical Association
intrathecally adverb
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