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intrathecal

[in-truh-thee-kuh l]

adjective

Anatomy. situated within the thecal sac: covering the spinal cord.

Medicine/Medical. administered into the thecal sac: intrathecal injections.

noun

Pharmacology. anesthesia administered into the thecal sac: She was given an intrathecal during labor.

Origin of intrathecal

First recorded in 1885–90; intra- + theca + -al¹

Related formsin·tra·the·cal·ly, adverb

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019