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radium

ra·di·um

radium

pronunciation:
reI di m
features:
Word Explorer, Word Parts
part of speech: noun
definition: a radioactive chemical element that has eighty-eight protons in each nucleus and that occurs in pure form as a solid metal, used esp. as a radiation source for cancer treatment. (symbol: Ra)
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Word Parts
The word radium contains the following part:
radi Latin root that means ray, spoke