a telescope for viewing the sun, adapted to protect the eye of the viewer from the sun's glare.

Nearby words

  1. heliometer,
  2. heliopause,
  3. heliophyte,
  4. heliopolis,
  5. helios,
  6. heliosphere,
  7. heliostat,
  8. heliotaxis,
  9. heliotherapy,
  10. heliotrope

Origin of helioscope

First recorded in 1665–75; helio- + -scope

Related formshe·li·o·scop·ic [hee-lee-uh-skop-ik] /ˌhi li əˈskɒp ɪk/, adjectivehe·li·os·co·py [hee-lee-os-kuh-pee] /ˌhi liˈɒs kə pi/, noun

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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