Ar`gil*la"ceous (#), a. [L. argillaceus, fr. argilla.]

Of the nature of clay; consisting of, or containing, argil or clay; clayey.

Argillaceous sandstone Geol., a sandstone containing much clay. -- Argillaceous iron ore, the clay ironstone. -- Argillaceous schist or state. See Argillite.


© Webster 1913.

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