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From polyploid +‎ -y, after German Polyploidie.



polyploidy (usually uncountable, plural polyploidies)

  1. (genetics) The condition of being polyploid or the process of becoming polyploid
    • 2011, Terence Allen and Graham Cowling, The Cell: A Very Short Introduction, Oxford 2011, p. 90:
      As they mature, the DNA is replicated several times but the cell does not divide, a condition known as polyploidy which allows cells to increase in size.
    • 2014 June 28, “Double or quits”, in The Economist, volume 411, number 8893:
      This propensity to polyploidy helps account for the diversity (and thus success) of flowering plants, in particular. It is also known that flowering plants sailed majestically through the life-destroying asteroid impact at the end of the Cretaceous period, which did for the dinosaurs and many other animals.

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