an early, tubeless radio receiver using a crystal detector.
an early form of radio receiver having a crystal detector to demodulate the radio signals but no amplifier, therefore requiring earphones
noun, Crystallography. 1. any of the six main classifications of crystals and of crystal lattices according to their symmetry: isometric, hexagonal, tetragonal, orthorhombic, monoclinic, and triclinic. noun 1. (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 […]
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.