The niagender spectrum or niaspec is an umbrella term for anyone on the "neutral gendered” spectrum. This includes anyone whose gender is neutral, partly neutral, or in some way similar to/resemblant of gender neutrality.
It is similar to, but not synonymous with ningender. Examples of niaspec genders include, but are not limited to: neutrois, epicene, stellarian, etc. Niagender can also be used as a gender on its own.
The state of having a niagender or having a gender which exists on the niagender spectrum is called niaty.