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| English | Arabic |
| radioactive tracer A radioactive isotope which, when injected into a biological or physical system, can be traced by radiation detection devices, permitting determination of the distribution or location of the substance to which it is attached | مقتفي الإشعاعات |
| radioactive tracer technique | تقنية مقتفي الأثر الإشعاعي |
| tracer of pollution | كاشف أو مقتفي للتلوث |