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[rey-dee-oh-ak-tuh-veyt] /ˌreɪ di oʊˈæk təˌveɪt/

verb (used with object), radioactivated, radioactivating. Physics.
to make (a substance) .
(transitive) to make radioactive


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  • Radioactive

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  • Radioactive constant

    radioactive constant n. See decay constant.

  • Radioactive-decay

    noun, Physics. 1. (def 8). noun 1. disintegration of a nucleus that occurs spontaneously or as a result of electron capture. One or more different nuclei are formed and usually particles and gamma rays are emitted Sometimes shortened to decay Also called disintegration radioactive decay (rā’dē-ō-āk’tĭv) The spontaneous transformation of an unstable atomic nucleus into […]

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