Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Having an extra copy of one or more chromosomes: a polysomic individual; a polysomic cell.
  • n. A polysomic organism or cell.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Having one or more duplicated chromosomes beyond the normal diploid complement
  • adj. In auto-polyploids, inheritance that involves pairing of homeologous chromosomes, rather than strictly homologous pairs.
  • n. such an organism or chromosome

Etymologies

poly- + (chromo)som(e) + -ic.
(American Heritage® Dictionary of the English Language, Fourth Edition)

Examples

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