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An identifying or descriptive marker that is attached to an object
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A brief description given for purposes of identification
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Trade name of a company that produces musical recordings
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A radioactive isotope that is used in a compound in order to trace the mechanism of a chemical reaction
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Distinguish (an element or atom) by using a radioactive isotope or an isotope of unusual mass for tracing through chemical reactions
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Distinguish (as a compound or molecule) by introducing a labeled atom
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Assign a label to; designate with a label
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Pronounce judgment on
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Attach a tag or label to