Submitted by György Chityil ... on Sat, 01/20/2018 - 00:52 Hierarchy: NounDescription: {{transport|nautical}} A form of marine vessel which allows wheeled vehicles to be driven on and off.Ngram: roll-on roll-offNgram Text: roll-on roll-offSource: WiktionaryIssue: 0Wiktionary tag: transportNgram Count: 2