The English word can be transliterated into Tagalog as apéndiks.
apendíse
appendix
Most Filipinos simply use the transliteration of the English word.
Aside from being the name of a body part, the English word “appendix” can also refer to supplementary material attached at the end of a piece of writing. Example: The book’s appendix includes a bibliography.
KAHULUGAN SA TAGALOG
Maliit na túbo ng kalamnan na tíla súpot at nakakabit sa dulong ibabâ ng cecum.