[建] 铌酸

Columbic \Co*lum"bic\, a. [From {Columbo}.]
Pertaining to, or derived from, the columbo root.

{Columbic acid} (Chem.), an organic acid extracted from the
columbo root as a bitter, yellow, amorphous substance.


Columbic \Co*lum"bic\, a. [From {Columbium}.] (Chem.)
Pertaining to, or containing, columbium or niobium; niobic.

{Columbic acid} (Chem.), a weak acid derived from columbic or
niobic oxide, {Nb2O5}; -- called also {niobic acid}.