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illinium

[ih-lin-ee-uh m] /ɪˈlɪn i əm/
noun, Chemistry. (formerly)
1.
promethium. Symbol: Il.
Origin of illinium
1925-1930
1925-30; named after Illinois; see -ium
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for illinium

illinium

/ɪˈlɪnɪəm/
noun
1.
(chem) the former name for promethium
Word Origin
C20: New Latin, from Illinois + -ium
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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