Definify.com

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.

Similar Results