User blog comment:LittlePeng9/Higher order set theory/@comment-2033667-20141010133022/@comment-2033667-20141010134312

due to the everlasting oodle we need to develop more temporary terms. i retract my usage of the term "class" because it's likely to coincide with existing terminology as well as itself, and instead propose "pile." so set is a 0-pile, class is 1-pile, superclass is 2-pile, etc. thus it is ok to talk about superpiles and ordinal rankings of piles.