Meaning of hexaploid

hex•a•ploid

Pronunciation: (hek'su-ploid"), [key]
— Biol. Biol.
—adj.
  1. having a chromosome number that is six times the haploid number.
—n.
  1. a hexaploid cell or organism. Cf. polyploid.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.