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 [Terms] [Paper]