Dictionary
spectroheliogram
noun spec·tro·he·lio·gram \ˌspek-trō-ˈhē-lē-ə-ˌgram\
Definition of SPECTROHELIOGRAM
: a photograph of the sun that is made by monochromatic light and shows the sun's faculae and prominences
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First Known Use of SPECTROHELIOGRAM
1905
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