argillite argilliferous • argillitic · · · Info · Definitions · Characters · · argillite · · Text Latin · · Script 9 · · Length Definitions · · · (noun) a sedimentary rock differing from shale in being bound by silica and from slate in having no slate cleavages. · · Noun Definition 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 l latin small letter l U+006C r latin small letter r U+0072 t latin small letter t U+0074