Headcanon vs. Fanon — What's the Difference?

(fandom slang) Elements and interpretations of a fictional universe accepted by an individual or small group of fans, but not necessarily found within or supported by the official canon.

A vestment reserved only for the Pope for use during a pontifical Mass.

(fandom slang) To interpret in the form of a headcanon.

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.

A maniple.

(surgery) A fold of linen laid under a splint.

(fandom) 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.

A term applied to various articles,