Submitted by György Chityil ... on Sat, 01/20/2018 - 01:15 Hierarchy: NounDescription: {{algebra}} A root of the polynomial ''x<sup>5</sup> + x + a'', where ''a'' is a complex number.Ngram: ultraradicalNgram Text: ultraradicalSource: WiktionaryIssue: 0Wiktionary tag: algebraNgram Count: 1