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abelian

Flag: gbEnglishOxford Dictionary of English

abelian /əˈbiːliən , əˈbɛliən /
adjective Mathematics (of a group) having members related by a commutative operation (i.e. a*b = b*a).
– ORIGIN mid 19th century: from N. H. Abel (see Abel, Niels Henrik) + -ian.