WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / O / one-billionth one-billionth noun 13 letters Scrabble 17 WWF 21 Definitions noun one part in a billion equal parts billionth Look “one-billionth” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →