Dictionary.com
Thesaurus.com

ionium

American  
[ahy-oh-nee-uhm] / aɪˈoʊ ni əm /

noun

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


ionium British  
/ aɪˈəʊnɪəm /

noun

  1.  Ioobsolete a naturally occurring radioisotope of thorium with a mass number of 230

"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

Etymology

Origin of ionium

First recorded in 1905–10; ion + -ium

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Ionium pelagus . . . atrox, sævum; that is, looking dangerous, and often enough also bringing misfortune.

From Döderlein's Hand-book of Latin Synonymes by Döderlein, Ludwig

Ionium expels an alpha particle and becomes radium, which is a bivalent element resembling barium belonging to the second group.

From A Brief Account of Radio-activity by Venable, Francis Preston

They had been anticipated by Gaius Norbanus and Decidius Saxa, who had crossed over into Ionium before Staius reached there, had occupied the whole country as far as Pangaeum, and had encamped near Philippi.

From Dio's Rome, Volume 3 An Historical Narrative Originally Composed in Greek During The Reigns of Septimius Severus, Geta and Caracalla, Macrinus, Elagabalus and Alexander Severus by Foster, Herbert Baldwin

Qualiter undas Qui secat, et geminum gracilis mare separat isthmos, Nec patitur conferre fretum; si terra recedat, Ionium Ægæo frangat mare.

From The Life of Cicero Volume One by Trollope, Anthony

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "ionium" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com