haploidy

This term is a specialized biological descriptor used primarily in genetics and cytology. It describes a specific chromosomal state rather than a process, distinguishing it from haploidization. It is almost exclusively used in academic, medical, or scientific registers to describe the genetic makeup of gametes or certain fungal and algal life cycles.

As an abstract biological state, the word is uncountable. It refers to the condition of being haploid and does not refer to individual instances or objects that can be counted.