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English word pixie dust comes from English dust, English pixie
dust (English)
(countable) The act of cleaning by dusting.. (figurative) A low or mean condition.. (figurative) Something worthless.. (mathematics) A totally disconnected set of points with a fractal structure.. (obsolete) A single particle of earth or other material.. (slang, dated) cash; money (in reference to gold dust).. (uncountable) Fine, dry particles of matter found in the air and covering the [...]
pixie (English)
(astronomy, meteorology) An upper-atmospheric optical phenomenon associated with thunderstorms, a short-lasting pinpoint of light on the surface of convective domes that produces a gnome.. (mythology, fantasy literature, fairy tales) A playful sprite or elflike or fairy-like creature.. (slang) A cute, petite woman with short hair.
pixie dust (English)
(fantasy) Magical dust associated with pixies; fairy dust.. (figurative) Any undefined means of working magic, in a metaphorical sense.