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Entry 2 senses Webster, 1913

Water telescope

· IPA
01 A telescope in which the medium between the objective and the eye piece is water instead of air, used in some experiments in aberration.
  1. 1.
    A telescope in which the medium between the objective and the eye piece is water instead of air, used in some experiments in aberration.(Optics)
  2. 2.
    A telescope devised for looking into a body of water.