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iridium

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iridium /irid·i·um/ (Ir) (ĭ-rid´e-um) chemical element, at. no. 77.
iridium Ir 192  an artificial radioactive isotope with a half-life of 75 days, used in radiotherapy.

i·rid·i·um (-rd-m)
n. Symbol Ir
A hard, brittle, corrosion-resistant metallic element, whose radioisotope is used in the treatment of tumors. Atomic number 77.

iridium (Ir)
[irid′ē·əm]
Etymology: Gk, iris, rainbow
a silvery-bluish metallic element. Its atomic number is 77; its atomic mass is 192.22.

iridium (Ir) [ĭ-rid´e-um, i-rid´e-um]
a chemical element, atomic number 77, atomic weight 192.2. (See Appendix 6.)

iridium (Ir) (irid´ēm),
n a silvery-bluish metallic element. Its atomic number is 77 and its atomic weight is 192.2.

iridium
a chemical element, atomic number 77, atomic weight 192.2, symbol Ir. See Table 6.


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THE SECOND COMING OF IRIDIUM Ten years after suffering one of tech's most spectacular flameouts, satellite phone service Iridium Communications is staging a comeback.
Iridium Satellite LLC, the world's only mobile satellite services (MSS) operator with truly global coverage, has formed a company called, "Iridium Communications Russia, OOO" to pursue a license for providing MSS services in Russia.
In its effort to continue its expansive growth in the South American market, Iridium(R) Satellite announces a partnership with Tesacom(R), one of the key South American channel partners of Iridium service provider, Stratos Global Corporation.
 
 
 
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