Relating to an appendix, specifically to the vermiform appendix.

Of the nature of an appendix.

adjective. Of or like an appendix.

adjective. Of, pertaining to, or of the nature of an appendix or appendices.

adjective. Of, pertaining to, or of the nature of the vermiform appendix.

"It is not a dramatic poem in the sense that “Pippa Passes” is, for its ten Books (the first and twelfth are respectively introductory and appendical) are monologues."