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Pronunciation: i-rid'e-am

Definition: A white, silvery metallic element, atomic no. 77, atomic wt. 192.22; 192Ir is a radioisotope (half-life of 73.83 days) that has been used in the interstitial treatment of certain tumors.

[L. iris, rainbow]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.