Middlegender is a neurogender or xenogender specific for systems that have middles/systeens. It is a gender that can only be described by middles/systeens, since the experience of being a systeen in a system is so unique the gender experiences that come with it would be just as unique as the middles themselves.
It can be used as a modifier or alongside other genders to help describe an age forger's experience with gender, such as middlegirl, middleboy, middlenby, etc.
This term falls under the Effective umbrella. Similar terms are listed in the Tubuhive umbrella, the Pluralive umbrella, and/or the the Divinive umbrella.
History
This term was coined by Cryptocrew, specifically Arwen, on June 4th - June 5th of 2021. This term was coined through this page, and has no outside resources.