Di'dym or Di-dym'i-üm, n.
n. [See infra.] A rare metal related to cerium, in whose ores it is found;— so called from its intimate association with the ores of lantanium, which are always found with those of cerium.
n. [See infra.] A rare metal related to cerium, in whose ores it is found;— so called from its intimate association with the ores of lantanium, which are always found with those of cerium.