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any chromosome other than a sex chromosome.
any chromosome that is not a sex chromosome

coined 1906 by U.S. cytologist T.H. Montgomery (1873-1912), from auto- + -some (3)). Related: Autosomal.

autosome au·to·some (ô’tə-sōm’)
A chromosome other than a sex chromosome, normally occurring in pairs in somatic cells and singly in gametes.
au’to·so’mal (-sō’məl) adj.
au’to·so’mal·ly adv.


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