The action or practice of gazing into a crystal ball in the hope or belief of seeing the future.

A periodic nanostructure that exhibit periodicity in its structure that results in bandgaps where energy cannot propagate, as well as negative refraction that can be exploited for wave focusing.

a crystal which exhibits a spontaneous electric dipole moment

(electronics) A small crystal of quartz accurately cut in certain directions so that it can be vibrated at a particular frequency, to produce an electric signal of constant known frequency.

a clock which is regulated by a quartz crystal

plural of liquid crystal display

A display device that uses liquid crystals to control luminance of each pixel or pattern.

(pathology, especially in plural) Elongated, double-pyramidal crystal of eosinophils found in the sputum in bronchial asthma

(chemistry, physics) A description of various properties of transition element complex compounds that compares the effects of its ligands to that of neighbouring atoms in a crystal

plural of quartz-crystal clock