NOUN (1)

1. (genetics) an organism or cell having more than twice the haploid number of chromosomes;


ADJECTIVE (1)

1. of a cell or organism having more than twice the haploid number of chromosomes;
- Example: "a polyploid cell"
- Example: "a polyploid species"

WordNet (r) 3.0 (2006):

polyploid
    adj 1: of a cell or organism having more than twice the haploid
           number of chromosomes; "a polyploid cell"; "a polyploid
           species" [ant: diploid, haploid, haploidic,
           monoploid]
    n 1: (genetics) an organism or cell having more than twice the
         haploid number of chromosomes