neodymium: a yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium
physical entity: an entity that has physical existence
hebrews: the ethnic group claiming descent from Abraham and Isaac (especially from Isaac's son Jacob); the nation whom God chose to receive his revelation and with whom God chose to make a covenant (Exodus 19)