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tantalous

[tan-tl-uh s] /ˈtæn tl əs/
adjective, Chemistry
1.
containing trivalent tantalum.
Origin
1865-1870
1865-70; tantal(um) + -ous
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for tantalous

tantalous

/ˈtæntələs/
adjective
1.
of or containing tantalum in the trivalent state
Word Origin
C19: from tantal(um) + -ous
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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