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ra·di·o·ac·tive

radioactive

 
pronunciation:
reI di o aek tihv
features:
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part of speech: adjective
definition: giving off energy as a result of the decay of unstable atoms.
Nuclear waste is dangerous because it is highly radioactive.
derivation: radioactively (adv.)
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The word radioactive contains the following parts:
radi Latin root that means ray, spoke
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