| Pronunciation: | | `reydeeow'Isu`towp
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 WordNet Dictionary |
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| | Definition: | |
[n] a radioactive isotope of an element; produced either naturally or artificially |
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RADIOISOTOPE is a 12 letter word that starts with R. |
| | See Also: | | iodine-125, iodine-131, isotope, label, tracer |
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| Medical Dictionary |
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| | Definition: | | a radioactive material injected into the body so that a nuclear scanner can make pictures. |
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| Biology Dictionary |
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| | Definition: | | An isotope of an element that undergoes spontaneous decay with the release of radioactive particles. |
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