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Definition

noun

A haploid cell having several copies of the set of chromosomes.

adjective

Of or pertaining to a cell or organism containing more than two copies of the same haploid genome.

Supplement

Related forms: polyhaploidy (noun), polyhaploidic (adjective).
Compare: haploidy, diploidy, monoploidy, dihaploidy, polyploidy.
See also: ploidy, homologous chromosomes.