No, it’s not just a tiny organ pouch that requires surgery when it begins to hurt; an appendix is also additional material at the end of a book or paper.

You would think that the appendix at the end of a book came after appendix the body part, wouldn’t you? After all, our bodies have been around a lot longer than books have. But you’d be wrong. The name for the organ, also known as vermiform appendix, came into use later, no doubt because it is something attached — as its Latin root is translated — to the intestines just as an appendix is attached to the end of a book.

Definitions of appendix
  1. noun

    a vestigial process that extends from the lower end of the cecum and that resembles a small pouch

    cecal appendage, vermiform appendix, vermiform process
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    type of:

    appendage, outgrowth, process

    a natural prolongation or projection from a part of an organism either animal or plant

  2. noun

    supplementary material that is collected and appended at the back of a book

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    a brief addendum at the end of a newspaper article

    a supplement to a will; a testamentary instrument intended to alter an already executed will
    type of:

    addendum, postscript, supplement

    textual matter that is added onto a publication; usually at the end

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