ionization chamber

noun

: a partially evacuated tube provided with electrodes so that its conductivity due to the ionization of the residual gas reveals the presence of ionizing radiation

Examples of ionization chamber in a Sentence

Recent Examples on the Web
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The ionization chambers used in standard radiotherapy can’t respond accurately when dose rates spike hundreds of times higher in a matter of microseconds. IEEE Spectrum, 6 Mar. 2026

Word History

First Known Use

1904, in the meaning defined above

Time Traveler
The first known use of ionization chamber was in 1904

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Cite this Entry

“Ionization chamber.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ionization%20chamber. Accessed 3 Apr. 2026.

Medical Definition

ionization chamber

noun
: a partially evacuated tube provided with electrodes so that its conductivity due to the ionization of the residual gas reveals the presence of ionizing radiation

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