| 释义 |
niobous, a. Chem.|naɪˈəʊbəs|
[f. niob-ium + -ous.]
Derived from niobium (denoting a lower degree of oxidation than niobic).
1863Fownes' Chem. (ed. 9) 366 With oxygen niobium forms two oxides of acid character, niobous acid, NbO, and niobic acid, NbO2. 1866Watts Dict. Chem. IV. 49 The fused mass digested in water leaves niobous oxide. |
