Submitted by György Chityil ... on Fri, 01/19/2018 - 21:51 Hierarchy: NounDescription: {{context|number theory}} The set of positive integers, {1, 2, 3, ...}.Ngram: natural numbersNgram Text: natural numbersSource: WiktionaryIssue: 0Wiktionary tag: number theoryNgram Count: 2