helioscope

American  

[hee-lee-uh-skohp] / ˈhi li əˌskoʊp /

noun

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

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Other Word Forms

• helioscopic adjective
• helioscopy noun

Etymology

Origin of helioscope

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

Example Sentences

The Sun, 181. shade glasses for telescopes in viewing, 181. solar prism, 181. helioscope, 181. periodicity of spots, 181. to see, by projection, 182. spectroscope for solar observation, 182.

From Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers by Serviss, Garrett Putman

He studied the sun carefully through colored glasses in a helioscope and then conceived the idea of projecting the sun's image on a screen in order to study its surface.

From The Popes and Science The History of the Papal Relations to Science During the Middle Ages and Down to Our Own Time by Walsh, James J.

Each insect, wakened but an hour ago by the warmth of the moist soil, in an abandonment of the moment, is a helioscope transmitting signals of pure pleasure.

From Tropic Days by Banfield, E. J. (Edmund James)