Är'gil-līte, n.
n. [Gr. ἀργίλος, clay, and λίθος, stone.] (Min.) Argillaceous schist or slate; clay-slate. Its usual color is bluish or blackish gray, more rarely greenish gray. Dana.
n. [Gr. ἀργίλος, clay, and λίθος, stone.] (Min.) Argillaceous schist or slate; clay-slate. Its usual color is bluish or blackish gray, more rarely greenish gray. Dana.