spectroheliogram

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noun spec·tro·he·lio·gram \ˌspek-trō-ˈhē-lē-ə-ˌgram\

Definition of spectroheliogram

  1. :  a photograph of the sun that is made by monochromatic light and shows the sun's faculae and prominences

1905

First Known Use of spectroheliogram

1905


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a rounded knoll or a ridge of ice

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