Submitted by György Chityil ... on Sat, 01/20/2018 - 01:06 Hierarchy: NounDescription: {{physics}} A mass of fissile material that is more than sufficient to sustain a nuclear chain reactionNgram: supercritical massNgram Text: supercritical massSource: WiktionaryIssue: 0Wiktionary tag: physicsNgram Count: 2