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Meaning of heterokaryon

het•er•o•kar•y•on

Pronunciation: (het"ur-u-kar'ē-on", -un), [key]
— pl. -kar•y•a
  1. a cell containing two or more nuclei of differing genetic constitutions.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.