triploidy

https://doi.org/10.1351/goldbook.11320

Presence of three haploid sets of chromosomes in the cell.

Note: The condition is fatal in fetal or early neonatal life.

See also: diploid, euploid

Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 815 (https://doi.org/10.1515/pac-2015-1202)