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4 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 ra·dio·ac·tive /ˌredioˈæktɪv/

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 ra·dio·ac·tive /ˌredɪoˈæktɪv/ 形容詞

From: Webster's Revised Unabridged Dictionary (1913)

 ra·di·o·ac·tive a.
 1. Physics Capable of luminescence under the action of cathode rays, X rays, or any of the allied forms of radiation. [obsolete]

From: WordNet (r) 2.0

      adj : exhibiting or caused by radioactivity; "radioactive
            isotope"; "radioactive decay"; "radioactive fallout"
            [ant: nonradioactive]