spectrohelioscope

noun
spec·​tro·​he·​lio·​scope | \ ˌspek-trō-ˈhē-lē-ə-ˌskōp How to pronounce spectrohelioscope (audio) \

Definition of spectrohelioscope

2 : an instrument similar to a spectroheliograph used for visual as distinguished from photographic observations

First Known Use of spectrohelioscope

1906, in the meaning defined at sense 1

History and Etymology for spectrohelioscope

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The first known use of spectrohelioscope was in 1906

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