Submitted by György Chityil ... on Fri, 01/19/2018 - 21:51 Hierarchy: NounDescription: {{complex analysis}} A number of the form ''ai'', where ''a'' is a real number and ''i'' the imaginary unitNgram: imaginary numberNgram Text: imaginary numberSource: WiktionaryIssue: 0Wiktionary tag: complex analysisNgram Count: 2