WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / A / atomic number 21 atomic number 21 noun 16 letters Scrabble 20 WWF 26 Definitions noun a white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveitite scscandium Look “atomic number 21” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →