WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / A / atomic number 57 atomic number 57 noun 16 letters Scrabble 20 WWF 26 Definitions noun a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth lalanthanum Look “atomic number 57” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →