WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / N / nucleon number nucleon number noun 4 syllables 14 letters Scrabble 19 WWF 28 Definitions noun the sum of the number of neutrons and protons in an atomic nucleus mass number Look “nucleon number” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →