单词	radi-
释义	radi- combining form variants or radio- 1 : radiant energy : radiation radioactive radiopaque 2 : radioactive radioelement 3 : radium : X-rays radiotherapy 4 : radioactive isotopes especially as produced artificially radiocarbon 5 : radio radiotelegraphy 6 : radius bone radio-ulna Word History Etymology French, from Latin radius ray
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