A-pŏph'yl-līte or Āp'o-phȳl'lite, n.

(117), n. [Gr. ἀπό, from, off, and φύλλον, leaf; so called from its foliated structure or easy cleavage.] (Min.) A zeolitic mineral, occurring in pearly, laminated masses, or glassy, square prisms or octahedrons, which break very readily across, and afford a surface with a pearly luster. It consists of silica, lime, potash, and water. Dana.