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.

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.