Becquerel ray
noun
Bec·que·rel ray
(ˌ)bek-ˌrel-, ˌbek-ə- 
: a ray emitted by a radioactive substance
—used before radioactive emissions were classified as alpha and beta particles and gamma-ray photons
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“Becquerel ray.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/Becquerel%20ray. Accessed 23 Dec. 2024.
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