WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / A / argillaceous rock argillaceous rock noun 17 letters Scrabble 25 WWF 31 Definitions noun a sedimentary rock formed from clay deposits Look “argillaceous rock” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →