radiosodium

[rey-dee-oh-soh-dee-uhm]

ra·di·o·so·di·um

[rey-dee-oh-soh-dee-uhm]
noun Chemistry.
the radioactive isotope of sodium having an atomic mass of 24 and a half-life of 14.9 hours: used as a tracer in biochemistry.

Origin:
1930–35; radio- + sodium
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Radiosodium is always a great word to know.
So is anhydrous. Does it mean:
any of a class of chemical compounds having the general formula ROH, where R represents an alkyl group and ?OH a hydroxyl group
with all water removed, especially water of crystallization
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