Ploidy is a term used to describe the number of sets of chromosomes in a cell. It is commonly used in genetics and cell biology. There are several synonyms for the word ploidy, including euploidy, aneuploidy, triploidy, tetraploidy, hexaploidy, octoploidy, and polyploidy. Euploidy refers to a cell that has a complete set of chromosomes, while aneuploidy refers to a cell that has an abnormal number of chromosomes. Triploidy, tetraploidy, hexaploidy, and octoploidy refer to cells that have three, four, six, or eight sets of chromosomes, respectively, while polyploidy describes cells that have more than two sets of chromosomes.