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Bible Dictionaries
Spectroheliogram

Webster's Dictionary

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Spectroheliograph
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(n.) A photograph of the sun made by monochromatic light, usually of the calcium line (k), and showing the sun's faculae and prominences.

Bibliography Information
Webster, Noah. Entry for 'Spectroheliogram'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​s/spectroheliogram.html. 1828.
 
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