illinium

[ih-lin-ee-uhm]

il·lin·i·um

[ih-lin-ee-uhm]
noun Chemistry. (formerly)
promethium. Symbol: Il

Origin:
1925–30; named after Illinois; see -ium
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Illinium is always a great word to know.
So is alum. Does it mean:
a double sulfate analogous to potassium alum, as aluminum ammonium sulfate, with the formula R2SO4?X2(SO4)3?24H2O, where R is alkali metal or ammonium
a vessel, commonly a glass bulb with a long neck bent downward, used for distilling or decomposing substances by heat
Collins
World English Dictionary
illinium (ɪˈlɪnɪəm)
 
n
chem the former name for promethium
 
[C20: New Latin, from Illinois + -ium]

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