1. A crust of tiny crystals lining a rock cavity, usually composed of the same minerals that occur in the rock.

1. an inner surface with a crust of tiny crystals.
2. an aggregation of calcium oxalate crystals found in certain plants.
3. A tiny yellow or white accumulation of extracellular material that builds up in Bruch's membrane of the eye.

1. A cavity in a rock, having its interior surface studded with crystals and sometimes filled with water; a geode.
2. one of a people and religious sect dwelling chiefly in the lebanon mountains of syria.

1. A rock-cavity lined with crystals; a geode, or, as miners call it, a vug.
2. one of a people and religious sect of syria, living chiefly in the mountain regions of lebanon and anti-libanus and the district of Hauran.

1. an adherent of an esoteric monotheistic religious sect living in the relative security of the mountains of syria and lebanon who believes that Al-hakim was an incarnation of god