helioscope

[hee-lee-uh-skohp]

noun

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

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. 2018

Examples from the Web for helioscope

Historical Examples of helioscope

To the "helioscope" employed by Father Scheiner two centuries and a quarter earlier, a species of micrometer was added.
A Popular History of Astronomy During the Nineteenth Century
Agnes M. (Agnes Mary) Clerke
A few words must here be said concerning the helioscope, which on more than one occasion played a prominent part in this war.
The Story of the Zulu Campaign
Waller Ashe