WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / H / humic substance humic substance noun 15 letters Scrabble 25 WWF 31 Definitions noun an organic residue of decaying organic matter Look “humic substance” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →