any of the six main classifications of crystals and of crystal lattices according to their symmetry: isometric, hexagonal, tetragonal, orthorhombic, monoclinic, and triclinic.
(crystallog) any of six, or sometimes seven, classifications of crystals depending on their symmetry. The classes are cubic, tetragonal, hexagonal, orthorhombic, monoclinic, and triclinic. Sometimes an additional system, trigonal, is distinguished, although this is usually included in the hexagonal system See also crystal class
noun 1. . noun 1. a bog shrub, Ledum palustre, of the heath family, found from the North Temperate Zone to the Arctic Circle, having leaves that are rust-colored and hairy beneath with rolled margins, and dense clusters of white flowers.
- Crystal therapy
noun the use of crystals in alternative medicine to attempt healing; also called crystal healing See crystal healing
noun 1. . noun 1. another name for gentian violet crystal violet n. A dye derived from gentian violet that is used as a general biological stain, an acid-base indicator, and an agent against infection by bacteria, fungi, pinworms, and other parasites.
[“CS-4 Language Reference Manual and Operating System Interface”, Ben M. Brosgol et al, Report IR-130-2, Intermetrics, Cambridge MA, Oct 1975]. (1995-01-19)