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Meaning of polytomy

po•lyt•o•my

Pronunciation: (pu-lit'u-mē), [key]
— pl. -mies.
  1. the act or process of dividing into more than three parts.
  2. the state or condition of being so divided.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.