1. solar telescope a telescope designed to make observations of the sun
  2. Schmidt telescope reflecting telescope that has plate that corrects for aberration so a wide area of sky can be photographed
  3. coude telescope a reflecting telescope so constructed that the light is led to a plate holder or spectrograph
  4. Galilean telescope a type of refracting telescope that is no longer used in astronomy
  5. telescope a magnifier of images of distant objects
  6. radio telescope astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extraterrestrial sources
  7. polariscope an optical device used to measure the rotation of the plane of vibration of polarized light
  8. laryngoscope a medical instrument for examining part of the throat
  9. stereoscope an optical device for viewing stereoscopic photographs
  10. arthroscope a type of endoscope that is inserted into a joint for visual examination
  11. Gregorian telescope a reflecting telescope that has a paraboloidal primary mirror and a hyperboloidal secondary mirror; light is brought to a focus through an aperture in the center of the primary mirror
  12. stethoscope a medical instrument for listening to sounds inside the body
  13. orthoscope an ophthalmoscope with a layer of water to neutralize the refraction of the cornea
  14. Maksutov telescope reflecting telescope in which the aberration of the concave mirror is reduced by a meniscus lens
  15. Herschelian telescope a reflecting telescope with the mirror slightly tilted to throw the image to the side where it can be viewed
  16. spectroscope an optical instrument for spectrographic analysis
  17. solar plexus a large plexus of sympathetic nerves in the abdomen behind the stomach
  18. telescopy the art of making and using telescopes
  19. electroscope measuring instrument that detects electric charge
  20. arthroscopy a minimally invasive operation to repair a damaged joint