[ tan-tl-uh s ]
/ ˈtæn tl əs /

adjective Chemistry.

containing trivalent tantalum.


Discover The Influence Of Portuguese On English Via This Quiz!
We’ve gathered some interesting words donated to English from Portuguese … as well as some that just don’t translate at all. Do you know what they mean?
Question 1 of 11
Which of the following animal names traces its immediate origin to Portuguese?

Origin of tantalous

First recorded in 1865–70; tantal(um) + -ous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for tantalous

/ (ˈtæntələs) /


of or containing tantalum in the trivalent state

Word Origin for tantalous

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