Helioscope
Pronunciation : He"li*o*scope
Part of Speech : n.
Etymology : [Helio- + -scope: cf. F. h?lioscope.] (Astron.)
Definition : Defn: 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. -- He`li*o*scop`ic, a.
Source : Webster's Unabridged Dictionary, 1913