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iodine 125

Pronunciation: i'o-din

Definition: a radioisotope of iodine with decay by K capture (internal conversion) and a half-life of 59.4 days; used as a label in immunoassay and in imaging; formerly used as a tracer in thyroid studies and as a label in imaging.

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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