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ionium

[ ahy-oh-nee-uhm ]

noun

, Chemistry.
  1. a naturally occurring radioactive isotope of thorium. : Io; : 90; : 230.


ionium

/ aɪˈəʊnɪəm /

noun

  1. obsolete.
    a naturally occurring radioisotope of thorium with a mass number of 230 Io
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of ionium1

First recorded in 1905–10; ion + -ium
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Word History and Origins

Origin of ionium1

C20: from New Latin, from ion + -ium
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Example Sentences

She also proved that a recently discovered element – ionium – didn’t exist.

From Nature

Rona’s new job was to isolate “ionium,” a mysterious substance that was suspectedof being new element.

From Salon

Unlike those that had failed before her, Rona proved “ionium” was simply an isotope of thorium.

From Salon

So, too, he makes us realise, with a quickening and expanding emotion, which seems to bring us nearer to the core of Nature, the majesty of the sea breaking on a great expanse of shore,—the solemn stillness of midnight,—the invisible agency by which the clouds form the pageantry of the sky,—the active noiseless energy by which rivers wear away their banks,—by the use of words that seem exactly equivalent to the thing which they describe,— Quam fluitans circum magnis anfractibus aequor Ionium glaucis aspargit virus ab undis10.

Then crusty old Elias Loomis pioneered in devising the basis for modern weather maps and Bertram Boltwood discovered ionium.

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