Water telescope

1.(Optics) A telescope in which the medium between the objective and the eye piece is water instead of air, used in some experiments in aberration.
2.A telescope devised for looking into a body of water.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Forty-five people introduced the handicrafts featured at the Tabuk pavilion, including fishing nets and rattles, water telescopes, and ropes.