Dictionary

spectroheliogram

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

First Known Use of SPECTROHELIOGRAM

1905

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