I need a word for a system that exsists within another system. Like an organisism that lives inside another, that is potentially parisitic or symbiotic. A culture that exsists inside of another culture that is neither seperate nor assimilated.... Like a church or a mafia. A system that Exsists within.
I seek a noun to best describe a fascinating discovery made while googling something completely unrelated to what you've discovered. (Discovery of this [to be named] is frequently accompanied by an overwhelming urge to share it with others...)