Found 2 items, similar to argillaceous.
English → English (WordNet) Definition: argillaceous argillaceous adj : resembling or containing clay; “argillaceous rocks” [syn: clayey] [ant: arenaceous]
English → English (gcide) Definition: Argillaceous Argillaceous \Ar`gil*la"ceous\, a. [L. argillaceus, fr. argilla.] Of the nature of clay; consisting of, or containing, argil or clay; clayey. [1913 Webster] Argillaceous sandstone (Geol.), a sandstone containing much clay. Argillaceous iron ore, the clay ironstone. Argillaceous schist or state. See Argillite. [1913 Webster]