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niobous

American  
[nahy-oh-buhs] / naɪˈoʊ bəs /

adjective

  1. Chemistry.  containing trivalent niobium, as niobous chloride, NbCl 3 .

  2. of or relating to niobium.

niobous British  
/ naɪˈəʊbəs /

adjective

  1. Also: columbous.  of or containing niobium in the trivalent state

"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

Etymology

Origin of niobous

First recorded in 1860–65; niob(ium) + -ous

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.