WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / F / femtometer femtometer noun 10 letters Scrabble 17 WWF 19 Definitions noun a metric unit of length equal to one quadrillionth of a meter femtometrefermi Look “femtometer” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →