- Argillitic
- Argillite Ar"gil*lite, n. [Gr. ? clay + -lite.] (Min.) Argillaceous schist or slate; clay slate. Its colors is bluish or blackish gray, sometimes greenish gray, brownish red, etc. -- {Ar`gil*lit"ic}, a. [1913 Webster]
The Collaborative International Dictionary of English. 2000.