WordReference Random House Unabridged Dictionary of American English © 2026
ni•o•bic
(nī ō′bik, -ob′ik),USA pronunciation adj. [Chem.]
- of or pertaining to niobium;
columbic. - of or derived from niobic acid.
- niob(ium) + -ic 1835–45
'niobic' also found in these entries (note: many are not synonyms or translations):