tetraploid

adj

1. (not-comparable)Having four sets of chromosomes.

   “In potato, crosses between the tetraploid cultivated species Solanum tuberosum, and some clones of the diploid wild-type species S. phureja, constitute a method of producing maternal dihaploids.”

noun

1. A tetraploid cell.
2. A tetraploid organism.

   “The variation of caryopsis characters in species of Aegilops and wheat diploids is similar to that of wheat tetraploids .”