WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / A / atomic number 20 atomic number 20 noun 16 letters Scrabble 20 WWF 26 Definitions noun a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals cacalcium Look “atomic number 20” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →