spectroheliogram
noun
spec·tro·he·lio·gram
ˌspek-trō-ˈhē-lē-ə-ˌgram 
: a photograph of the sun that is made by monochromatic light and shows the sun's faculae and prominences
Cite this Entry
“Spectroheliogram.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spectroheliogram. Accessed 3 May. 2025.
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