WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / O / orthophosphorous acid orthophosphorous acid noun 6 syllables 21 letters Scrabble 36 WWF 37 Definitions noun a clear or yellow monobasic acid (H3PO2) hypophosphorous acidphosphorous acid Look “orthophosphorous acid” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →