'Pelopium' definitions:

Definition of 'Pelopium'

From: GCIDE

Pelopium \Pe*lo"pi*um\, n. [NL., fr. L. Pelops, brother of Niobe, Gr. ?.] (Chem.) A supposed new metal found in columbite, afterwards shown to be identical with columbium, or niobium. [1913 Webster]