Submitted by György Chityil ... on Fri, 01/19/2018 - 20:21 Hierarchy: NounDescription: {{set theory}} Of a set, a set that is a subset of the set but not equal to it.Ngram: proper subsetNgram Text: proper subsetSource: WiktionaryIssue: 0Wiktionary tag: set theoryNgram Count: 2
