Submitted by György Chityil ... on Fri, 01/19/2018 - 20:53 Hierarchy: NounDescription: {{geometry}} The locus of a point on the circumference of a circle that rolls without slipping on a fixed straight line.Ngram: cycloidNgram Text: cycloidSource: WiktionaryIssue: 0Wiktionary tag: geometryNgram Count: 1