delta ray

noun

Definition of delta ray

: an electron ejected by an ionizing particle in its passage through matter

First Known Use of delta ray

1908, in the meaning defined above

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The first known use of delta ray was in 1908

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Cite this Entry

“Delta ray.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/delta%20ray. Accessed 24 Oct. 2020.

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