The chromosomal constitution of a cell containing multiples of the normal number of chromosomes; includes triploidy (symbol: 3N), tetraploidy (symbol: 4N), etc.
The state of having three or more sets of chromosomes.
A lethal kind of chromosomal abnormality in which a child has one or more extra full sets of chromosomes.
A condition in which the chromosome number is two or more times the normal haploid number found in gametes.