WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / A / atomic number 5 atomic number 5 noun 15 letters Scrabble 20 WWF 26 Definitions noun a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder bboron Look “atomic number 5” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →