Submitted by György Chityil ... on Fri, 01/19/2018 - 21:56 Hierarchy: NounDescription: {{aviation|slang}} Solid terrain, such as mountains, obscured by clouds and thus posing a risk to the pilot of an aircraft.Ngram: cumulograniteNgram Text: cumulograniteSource: WiktionaryIssue: 0Wiktionary tag: aviationNgram Count: 1