WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / A / atomic number 55 atomic number 55 noun 16 letters Scrabble 20 WWF 26 Definitions noun a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal caesiumcesiumcs Look “atomic number 55” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →