Definition of allele noun from the Oxford Advanced Learner's Dictionary

 

allele

 noun
noun
BrE BrE//əˈliːl//
 
; NAmE NAmE//əˈliːl//
 
(biology) Genetic engineering
 
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one of two or more possible forms of a gene that are found at the same place on a chromosome See related entries: Genetic engineering Word Origin 1930s: from German Allel, abbreviation of allelomorph (from Greek allēl- ‘one another’ + morphē ‘form’).
See the Oxford Advanced American Dictionary entry: allele