spectroheliograph

 : 
Noun
 : 
spec=tro=he=li=o=graph

CIDE DICTIONARY

spectroheliographn. 
     An apparatus for making spectroheliograms, consisting of a spectroscopic camera used in combination with a telescope, and provided with clockwork for moving the sun's image across the slit.  [Webster 1913 Suppl.]

OXFORD DICTIONARY

spectroheliograph, n. an instrument for taking photographs of the sun in the light of one wavelength only.


For further exploring for "spectroheliograph" in Webster Dictionary Online


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