…a piece of a homogeneous solid substance having a natural geometrically regular form with symmetrically arranged plane faces…
…a simple early form of radio receiver with a crystal touching a metal wire as the rectifier (instead of a valve or transistor), and no amplifier or loudspeaker, necessitating headphones or an earphone…
…each of three axes used to define the edges of the unit cell of a crystal…
…a solid globe of glass or rock crystal, used by fortune-tellers and clairvoyants for crystal-gazing…
…each of thirty-two categories of crystals classified according to the possible combinations of symmetry elements possessed by the crystal lattice…
…a set of crystal faces defined according to their relationship to the crystal axes…
…transparent quartz, typically in the form of colourless hexagonal crystals…
…looking intently into a crystal ball with the aim of seeing images relating to future or distant events…
…the use of the supposed healing powers of crystals in alternative medicine…
…the symmetrical three-dimensional arrangement of atoms inside a crystal…
…a large building of prefabricated iron and glass resembling a giant greenhouse, designed by Joseph Paxton for the Great Exhibition of 1851 in Hyde Park, London, and re-erected at Sydenham near Croydon; it was accidentally burnt down in 1936…
…each of seven categories of crystals (cubic, tetragonal, orthorhombic, trigonal, hexagonal, monoclinic, and triclinic) classified according to the possible relations of the crystal axes…
…a synthetic violet dye, related to rosaniline, used as a stain in microscopy and as an antiseptic in the treatment of skin infections…
…a substance which flows like a liquid but has some degree of ordering in the arrangement of its molecules…
…a synthetic crystal that can manipulate or be sensitized to respond to specific wavelengths of light. Its development suggests the possibility of increased miniaturization and efficiency of computing components and other technologies…
…a form of visual display used in electronic devices, in which a layer of a liquid crystal is sandwiched between two transparent electrodes…
…a small crystal introduced into a liquid to act as a nucleus for crystallization…
…highly transparent glass with a high refractive index…
…a simple early form of radio receiver with a crystal touching a metal wire as the rectifier (instead of a valve or transistor), and no amplifier or loudspeaker, necessitating headphones or an earphone…
…the use of the supposed healing powers of crystals in alternative medicine…
