Stratogender is a naturogender defined as "when your gender has different layers. it could also possibly be used for cloud/skykin, since "strato" is like "stratosphere" comes from the prefix "strato", which means "layer."
History
Stratogender was coined on August 31, 2014 by an anonymous coiner on the tumblr blog purrloinsucks. The flag was created on September 6, 2015 by Pride-Flags on Deviantart