1. (n.) Something appended or added; an appendage, adjunct, or concomitant.

2. (n.) Any literary matter added to a book, but not necessarily essential to its completeness, and thus distinguished from supplement, which is intended to supply deficiencies and correct inaccuracies.

PS Parthian shot abdomen accessory addendum adjunct affix afterthought allonge anus appurtenance back matter blind gut bowels brain cecum chorus coda codicil colon colophon commentary conclusion consequence continuance continuation double take duodenum dying words enclitic endocardium entrails envoi epilogue follow-through follow-up foregut giblets gizzard guts heart hindgut infix innards inner mechanism insides interlineation internals interpolation intestine inwards jejunum kidney kishkes large intestine last words liver liver and lights lung marginalia midgut note parting shot perineum peroration postface postfix postlude postscript prefix proclitic pump pylorus rectum refrain rider scholia second thought sequel sequela sequelae sequelant sequent sequitur small intestine spleen stomach subscript suffix supplement swan song tag tail ticker tripes vermiform appendix viscera vitals works