Simple Definition of catheter

from our Learner's Dictionary

catheter

noun

ˈkæθətɚ

plural catheters

medical : a thin tube that is put into the body to remove or inject a liquid or to keep a passage open

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“Catheter.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/catheter. Accessed 20 Jun. 2026.

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