Ăr/gil-lā/ceoūs, a.
a. [Lat. argillaceus, from argilla.] Partaking of the nature of clay; consisting of clay.
Argillaceous sandstone (Geol.), a sandstone containing much clay.—Argillaceous iron ore, the clay iron-stone.
a. [Lat. argillaceus, from argilla.] Partaking of the nature of clay; consisting of clay.
Argillaceous sandstone (Geol.), a sandstone containing much clay.—Argillaceous iron ore, the clay iron-stone.