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Noun: optical illusion  'óp-ti-kul i'loo-zhun
  1. An optical phenomenon that results in a false or deceptive visual impression

Derived forms: optical illusions

Type of: optical phenomenon

Encyclopedia: Optical illusion

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optical crown glass
optical density
optical device
optical disc
optical disk
optical fiber
optical fibre
optical flint
optical fusion
optical glass
optical illusion
optical instrument
optical isomer
optical lens
optical maser
optical opacity
optical phenomenon
optical prism
optical pyrometer
optical rotation
optical scanner