didymium Meaning, Definition & Usage

Di*dym"i*um noun

Etymology

NL., fr. Gr. twin.

Definitions

1. (Chem.) A rare metallic substance usually associated with the metal cerium; -- hence its name. It was formerly supposed to be an element, but has since been found to consist of two simpler elementary substances, neodymium and praseodymium. See Neodymium, and Praseodymium.