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cryptozoology
cryst.
Crystal
crystal
crystal ball
crystal carbonate
crystal clear
crystal counter
crystal detector
crystal field theory
crystal gazing
crystal healing
Crystal Lake
crystal lattice
crystal meth
Crystal Palace
crystal pleat
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crystal detector
crys·tal de·tec·tor (plural crys·tal de·tec·tors)


noun 
Definition:
 
former device for decoding radio wave: a device consisting of a crystal in contact with a metal, used in early radio receivers to extract the information signal from a radio wave
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