The term trans system, also called a transitioned system or transgender system, can be used to describe a plural system that has gotten or wants to get a gender-related surgery for the body, as a collective. The term exists to describe the collective decision of wanting to undergo surgery to make headmates more comfortable in front.
This can also be used to describe when a system has decided on this purely because they have other headmates in the body now, and knows that they would not have made the same decision if they were a singlet.
Another way in which the term can be used, is when all headmates within the system are a gender that is the opposite of the body's sex (eg. all-male headmates in an AFAB body), though using this term towards a system that hasn't consented to being comfortable with it could be harmful, as if stating that the headmates couldn't possibly feel euphoria in the body.
The term can also be used alongside terms such as transmasculine (transmasc system) and transfeminine (transfem system)
History
The term, as it is now, was coined on June 22nd, 2021, by FANDOM user: Rose.Quartz.Council, however, the term and terms similar have clearly been used in the past for a while to describe this experience - not with a set consistent meaning or original coiner.
This term was coined through this page, and has no outside resources.
Flag
The trans system flag was designed by Discord user thenelsonsystem#0156 on September 5th, 2021. Its colour palette is a combination of lightened colours found on the transgender flag, the all-inclusive system pride flag, and mixtures of colours from both flags. The colour meanings are: Blue - transmasculine systems. Green - the wider plurality community. Yellow - transneutral and other trans systems. Pink - system love and happiness. Purple - transfeminine systems.
The transmasculine, transfeminine, and transneutral system flags were coined on the same day by the same user. Their colours follow the same meanings.