gadolinium
- n a ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth group
- They have tongue-twisting names (praseodymium, gadolinium, cerium, lanthanum, ytterbium, etc.
- My personal favorite is gadolinium.
- Professor Giauque used gadolinium sulfate octahydrate, a colorless crystal substance derived from a rare earth metal.