Submitted by György Chityil ... on Fri, 01/19/2018 - 22:05 Hierarchy: NounDescription: {{astrology}} the path followed by a planet, point, or degree from its rising point to its setting point.Ngram: diurnal arcNgram Text: diurnal arcSource: WiktionaryIssue: 0Wiktionary tag: astrologyNgram Count: 2