Helioscope

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Helioscope \He"li*o*scope\, n. [Helio- + -scope: cf. F.
     h['e]lioscope.] (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. --
     {He`li*o*scop`ic}, a.


     [1913 Webster]