definition scandium
Definition of scandium. : a silvery-white metallic element found widely especially in association with rare earth elements and used especially in alloys and in high-intensity electric lamps â see element table.
Freebase(0.00 / 0 votes)Rate this definition: Scandium is a chemical element with symbol Sc and atomic number 21. A silvery-white metallic transition metal, it has historically been sometimes classified as a rare earth element, together with yttrium and the lanthanoids.