Tridemigender is a combination of trigender and demigender. In other words, it is when one identifies as three demigenders. Tridemigender people can be a combination of any three demigenders. For example, a tridemigender person could be a demicat, a demiboy, and a demipup.
History
Tridemigender was coined on the LGBTA fandom by user Trashwoof on December 20th, 2020.