fanon

Short definition from Wiktionary

Noun

1. 1
   A vestment reserved only for the Pope for use during a pontifical Mass.
2. 2
   Part of a bishop's mitre. They are the tabs extending down from the mitre, often with a cross near the end of each. See lappet.
3. 3
   A maniple.
4. 4
   A fold of linen laid under a splint.
5. 5
   Elements introduced by fans which are not in the official canon of a fictional world but are widely believed to be or treated as if canonical.

Proper noun

1. 1
   A surname.