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spectroheliographOne entry found. Main Entry: spec·tro·he·lio·graph Pronunciation: \-ˌgraf\ Function: noun Etymology: International Scientific Vocabulary Date: 1892 : an apparatus for making spectroheliograms — spec·tro·he·li·og·ra·phy \-ˌhē-lē-ˈä-grə-fē\ noun
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