/mhw>, a. [ Cf. NL. arillatus, F. arillé. ] Having an aril. [ 1913 Webster ]
n. [ Gr. &unr_; 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]