/ əˈpendɪks; NAmE / noun ( pl. ap·pen·di·ces / -dɪsiːz; NAmE /)
1.
a small bag of tissue that is attached to the large intestine . In humans, the appendix has no clear function :
He had to have his appendix out (= removed) .
—picture at organ
2.
a section giving extra information at the end of a book or document :
Full details are given in Appendix 3.
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WORD ORIGIN
mid 16th cent. (in sense 2): from Latin , from appendere hang upon, from ad- to + pendere hang. Sense 1 dates from the early 17th cent.