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Webster 1913 Edition

Helioscope

He′li-o-scope

,
Noun.
[
Helio-
+
-scope
: cf. F.
hélioscope
.]
(Astron.)
A telescope or instrument for viewing the sun without injury to the eyes, as through colored glasses, or with mirrors which reflect but a small portion of light.
–
Heˊli-o-scopˊic
(#)
,
Adj.

Webster 1828 Edition

Helioscope

HE'LIOSCOPE

,
Noun.
[Gr. the sun, and to view.] A sort of telescope fitted for viewing the sun without pain or injury to the eyes, as when made with colored glasses, or glasses blackened with smoke.

Definition 2024

helioscope

helioscope

English

Noun

helioscope ‎(plural helioscopes)

  1. (astronomy) An apparatus for viewing the sun without injuring the eye.

Translations

Etymology

helio- +‎ -scope

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