<cell biology, genetics> A hybrid, usually a plant, which is created from two closely-related species and contains one or more extra sets of chromosomes (i.e. If each parent normally has two sets, the hybrid may have four). ... See: polyploid. ... (09 Oct 1997) ... 
A polyploid with more than two sets of chromosomes, each being derived from a different species.
Type: Term Pronunciation: al′ō-pol′i-ployd Definitions: 1. An alloploid having three or more haploid sets of chromosomes.
alloploid, allopolyploid A cell or organism having two or more sets of chromosomes derived from parents of different species or genera.