I. noun 1.
[Anatomy] a tube-shaped sac attached to and opening into the lower end of the large intestine in humans and some other mammals. In humans the appendix is small and has no known function, but in rabbits, hares, and some other herbivores it is involved in the digestion of cellulose.
• I’m merely standing in while Stella is having her appendix out.
Also called vermiform appendix.
2. a section or table of subsidiary matter at the end of a book or document. • a list of such activities was published as an appendix to the report.
• outline answers may be found in Appendix 2.
– origin mid 16th cent. (in sense 2): from Latin, from appendere ‘hang upon’ (see append). Sense 1 dates from the early 17th cent. / usage: Appendix typically has the plural appendixes in the anatomical sense, and appendices when referring to a part of a book or document.