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 [ah-pen´diks] (pl. appen´dices, appendixes) (L.)
1. a slender outgrowth or appendage.
2. a small appendage near the juncture of the small intestine and the large intestine (ileocecal valve). An apparently useless structure, it can be the source of a serious illness, appendicitis. Called also vermiform appendix. adj., adj appendic´eal.
vermiform appendix appendix (def. 2).


, gen.


, pl.




(ă-pen'diks, -di-sis, -di-sēs, -dik-sĕz),
1. An appendage or appendixlike structure.
2. A wormlike intestinal diverticulum extending from the blind end of the cecum; it varies in length and ends in a blind extremity. Synonym(s): appendix vermiformis [TA], appendix ceci, processus vermiformis, vermiform appendage, vermiform appendix, vermiform process, vermix
[L. appendage, fr. ap-pendo, to hang something on]


/ap·pen·dix/ (ah-pen´diks) pl. appen´dices, appendixes   [L.]
1. a supplementary, accessory, or dependent part attached to a main structure.

epiploic appendices  small peritoneum-covered tabs of fat attached in rows along the taeniae coli.
vermiform appendix  a wormlike diverticulum of the cecum.
Enlarge picture
Vermiform appendix and adjacent structures.
xiphoid appendix  see under process.


n. pl. appen·dices (-dĭ-sēz′) or appen·dixes
Anatomy Any of several supplementary or accessory parts of a bodily organ or structure, especially the vermiform appendix of the large intestine.


[əpen′diks] pl. appendices, appendixes
1 an accessory part attached to a main structure. Also called appendage.
2 See vermiform appendix. appendical, appendiceal, appendicial, appendicular, adj.


, pl. appendixes, appendices (ă-pendiks, -dik-sĕz, -di-sēz) [TA]
1. Synonym(s): appendage.
2. A wormlike intestinal diverticulum extending from the blind end of the cecum; it varies in length and ends in a blind extremity.
[L. appendage, fr. ap-pendo, to hang something on]


1. The worm-like structure attached to the CAECUM at the beginning of the large intestine and known as the vermiform appendix.
Appendixclick for a larger image
Fig. 42 Appendix . Location of appendix.



vermiform appendix

a small fingerlike projection from the tip of the CAECUM in the mammalian gut.

In herbivores the caecum and appendix are important, containing bacteria which facilitate the digestion of cellulose. In humans and other non-herbivores the caecum and appendix have no function. The appendix can become infected and must be removed surgically (appendectomy) if in this condition.


The worm-shaped pouch attached to the cecum, the beginning of the large intestine.


, pl. appendixes, appendices (ă-pendiks, -dik-sĕz, -di-sēz) [TA]
An appendage or appendixlike structure.
[L. appendage, fr. ap-pendo, to hang something on]


n 1. an accessory part of a main structure or text;
2. the term generally refers to the
vermiform appendix, which is located at the junction of the small and large intestines.


pl. appendices [L.]
1. a slender outgrowth or appendage.
2. the vermiform appendix, a slender diverticulum present in only a few mammals such as the rabbit, humans and the great apes. A structure of doubtful function, rich in lymphoid tissue.

appendix epididymis
a small, piriform body attached to the head of the epididymis that is a remnant of the blind cranial segment of the mesonephric duct.
appendix testis
a small cyst adjacent to the head of the epididymis that is a remnant of the paramesonephric (müllerian) duct. Called also Morgagni's hydatid.

Patient discussion about appendix

Q. What Causes Acute Appendicitis? I've heard that appendicitis is a very common situation. What causes it to happen? Is there a way to avoid it?

A. Appendicitis is caused by an infection of the appendix, usually from bacterias that are already located in the abdomen. It is not a situation that can be avoided and can occur in a high prevalence in the population.

More discussions about appendix
References in periodicals archive ?
Speaking of the draw stroke, since the shortest distance between two points is a straight line, and since the appendix carry draw comes from close to your centerline it produces an inherently faster draw stroke.
2: Shows distention of proximal bowel due to obstruction by appendix
The myriad appearances of the appendix can make diagnosis of acute appendicitis challenging.
Type A: Single caecum with one normally localised appendix exhibiting partial duplication.
The first authentic study of the position of appendix was conducted by Gladstone and Wakeley11,12 in I924, who studied 3000 anatomic dissections.
Parker says that his study shows two major problems with Darwin's idea of the appendix being a "biological remnant".
B2: In addition to a normal appendix arising from the caecum at the usual site, there is also a second, usually rudimentary, appendix arising from caecum along the lines of the taenia at a varying distance from the first.
The prevention messages in Appendix F stress how stimulant use leads to loss of control (sleeplessness, paranoia, hallucinations), as well as how easy it is to get addicted.
Appendix A--Lesson plans for field sanitation training course
Cameron Randles didn't know his appendix had ruptured.
Appendix A deals with the cross-examination of a DUI arresting officer and field sobriety tests, whereas Appendix B covers the cross-examination of a psychiatrist in a murder case.
Appendix A covers sampling plan standards and lists methods and attributes to be used within a plan.