Chromosome constitution differing from the usual diploid constitution by loss or duplication of chromosomes or chromosomal segments (13)
Organism or cell having a chromosome number other than an exact multiple of the monoploid or basic number; hyperploid = higher, hypoploid = lower = nullisome
{i} condition where abnormal numbers chromosomes (fewer or more) exist within the nucleus; cell or an organism that have an aneuploid chromosome number