alluvial soil alluvial sediment • alluviate · · · Info · Definitions · Characters · · alluvial soil · · Text Common · · Latin · · Scripts 13 · · Length 4 · · Syllables Definitions · · · (noun) a fine-grained fertile soil deposited by water flowing over flood plains or in river beds. Synonyms: alluvial soil. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 i latin small letter i U+0069 l latin small letter l U+006C o latin small letter o U+006F s latin small letter s U+0073 u latin small letter u U+0075 v latin small letter v U+0076