Sui generis
In sociology, the "sui generis" is what has been externalized, then internalized in the overall public and becomes a part of society that simply exists in its construct. It is not something that is not thought to have been created, because it is imbedded in everyone's way of thinking and being. Instances include the idea of love, or going to school, or clothing belonging to a specific gender. These examples are "sui generis" for they simply exist in society and are widely accepted without thoughts of where they come from or how they were created.
Code of Canons of the Eastern Churches
A church sui iuris is "a community of the Christian faithful, which is joined together by a hierarchy according to the norm of law and which is expressly or tacitly recognised as sui iuris by the supreme authority of the Church" (CCEO.27) . The term sui iuris is an innovation of CCEO (Codex Canonum Ecclesiarum Orientalium - Code of Canons of the Oriental Churches) and denotes the relative autonomy of the Oriental Catholic Churches. This canonical term, pregnant with many juridical nuances, indicates the God-given mission of the Oriental Catholic Churches to preserve their patrimonial autonomous nature. The autonomy of these churches is relative in the sense that they are under the authority of the Bishop of Rome.