Submitted by György Chityil ... on Fri, 01/19/2018 - 23:54 Hierarchy: AdjectiveDescription: {{context|of a speed|aviation}} equal to, or greater than, or capable of achieving, ten times the speed of sound.Ngram: plasmasonicNgram Text: plasmasonicSource: WiktionaryIssue: 0Wiktionary tag: of a speedaviationNgram Count: 1