Submitted by György Chityil ... on Sat, 01/20/2018 - 01:01 Hierarchy: NounDescription: {{astronomy}} an instrument that produced monochromatic photographs of the sun using light at a selected wavelengthNgram: spectroheliographNgram Text: spectroheliographSource: WiktionaryIssue: 0Wiktionary tag: astronomyNgram Count: 1
