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trisomy

Pronunciation: tri'so-me

Definition: The state of an individual or cell with an extra chromosome instead of the normal pair of homologous chromosomes; in humans, the state of a cell containing 47 normal chromosomes. For various types of trisomy syndrome, see entries under syndrome.

[tri- + (chromo)some]

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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