WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / S / spectral luminous efficiency spectral luminous efficiency 9 syllables 28 letters Scrabble 45 WWF 55 Definitions Look “spectral luminous efficiency” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →