Submitted by György Chityil ... on Sat, 01/20/2018 - 01:24 Hierarchy: NounDescription: {{physics}} A unit of surface area equal to 10<sup>-21</sup> barnsNgram: zeptobarnNgram Text: zeptobarnSource: WiktionaryIssue: 0Wiktionary tag: physicsNgram Count: 1