What is the meaning of appendex?

An appendix is a supplementary section at the end of a book, document, or report that provides additional information, such as data, charts, or explanations that are relevant but not essential to the main text. It can also refer to a small, tube-like structure attached to the large intestine in the human body, which is often considered to have no significant function. In both contexts, the appendix serves to enhance understanding or provide clarification.