(crystallography) Any of the seven distinct symmetry classifications of crystals: cubic, tetragonal, hexagonal, orthorhombic, monoclinic, triclinic and trigonal.

A small crystal from which a larger crystal of the same substance is grown

A periodic optical nanostructure that affects the motion of photons in much the same way that ionic lattices affect electrons in solids.

Glass that contains at least 24% lead oxide (PbO). / Cut glass made of this material.

Alternative form of anticrystal

Alternative form of quasicrystal

A temperature-controlled chamber used to maintain the quartz crystal in electronic crystal oscillators at a constant temperature, in order to prevent changes in the frequency due to variations in ambient temperature.

plural of crystal oven

An area mainly in the borough of Bromley, south-east Greater London, England, named after the "palace" that was erected there for The Great Exhibition of 1851 (OS grid ref TQ3471).

plural of crystal momentum