tantalous

[ tan-tl-uh s ]
/ ˈtæn tl əs /

adjective Chemistry.

containing trivalent tantalum.

Origin of tantalous

First recorded in 1865–70; tantal(um) + -ous

British Dictionary definitions for tantalous

tantalous
/ (ˈtæntələs) /

adjective

of or containing tantalum in the trivalent state

Word Origin for tantalous

C19: from tantal ( um) + -ous