The part of the trunk that lies between the thorax and the pelvis. The a. does not include the vertebral region posteriorly but is considered by some anatomists to include the pelvis (abdominopelvic cavity). It includes the greater part of the abdominal cavity (cavitas abdominis [TA]), and is divided by arbitrary planes into nine regions. SEE ALSO: abdominal regions, under region. SYN: venter (1) [TA]. [L. a., etym. uncertain]
- acute a. any serious acute intra-abdominal condition (such as appendicitis) attended by pain, tenderness, and muscular rigidity, and for which emergency surgery must be considered. SYN: surgical a..
- carinate a. a sloping of the sides with prominence of the central line of the a..
- navicular a. SYN: scaphoid a..
- a. obstipum rarely used term for deformity of the a. due to congenitally short rectus muscles.
- pendulous a. an a. with greatly relaxed muscular walls that sag down over the pubic region.
- protuberant a. unusual or prominent convexity of the a., due to excessive subcutaneous fat, poor muscle tone, or an increase in intraabdominal content.
- scaphoid a. a condition in which the anterior abdominal wall is sunken and presents a concave rather than a convex contour. SYN: navicular a..
- surgical a. SYN: acute a..

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ab·do·men 'ab-də-mən, -.dō-; əb-'dō-mən, ab- n
1 a) the part of the body between the thorax and the pelvis with the exception of the back called also belly
b) the cavity of this part of the trunk lined by the peritoneum, enclosed by the body walls, the diaphragm, and the pelvic floor, and containing the visceral organs (as the stomach, intestines, and liver)
c) the portion of this cavity between the diaphragm and the brim of the pelvis compare PELVIC CAVITY
2) the posterior often elongated region of the body behind the thorax in arthropods

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the part of the body cavity below the chest (see thorax), from which it is separated by the diaphragm. The abdomen contains the organs of digestion - stomach, liver, intestines, etc. - and excretion - kidneys, bladder, etc.; in women it also contains the ovaries and uterus.
abdominal adj.

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ab·do·men (abґdə-mən) (ab-doґmən) [L., possibly from abdere to hide] [TA] that portion of the body which lies between the thorax and the pelvis; it contains a cavity (abdominal cavity) separated by the diaphragm from the thoracic cavity above and by the plane of the pelvic inlet from the pelvic cavity below and lined with a serous membrane, the peritoneum. This cavity contains the abdominal viscera (see Plate 50) and is enclosed by a wall (abdominal wall) formed by the abdominal muscles, the vertebral column, and the ilia. Called also belly and venter. It is divided into nine regions by four imaginary lines projected onto the anterior wall (see illustration); two of the lines pass horizontally around the body (the upper at the level of the cartilages of the ninth ribs, the lower at the tops of the crests of the ilia), and two extend vertically on each side of the body from the cartilage of the eighth rib to the center of the inguinal ligament. The regions are: three upper—right hypochondrium, epigastric region, left hypochondrium; three middle—right flank (right lateral region), umbilicus, left flank (left lateral region); and three lower—right groin (right inguinal region), pubic region, left flank (left inguinal region).

Regions of abdomen: 1, epigastric region; 2, right hypochondrium; 3, left hypochondrium; 4, right flank; 5, umbilicus; 6, left flank; 7, right groin; 8, pubic region; 9, left flank. A, transpyloric plane; B, transtubercular plane; C, midclavicular line.

Medical dictionary. 2011.


Look at other dictionaries:

  • ABDOMEN — L’abdomen humain est un segment volumineux du tronc qui s’interpose entre le thorax et la cavité pelvienne, ou petit bassin. Il loge, dans une cavité revêtue d’une séreuse, le péritoine, des viscères digestifs, urinaires et génitaux (fig. 1). 1.… …   Encyclopédie Universelle

  • Abdomen — humano. Proyección superficial de los órganos del tronco y abdomen, donde la localización de la mayoría de los órganos de éste último está a partir del nivel inferior costal y hasta el hueso ilíaco …   Wikipedia Español

  • abdomen — ABDOMÉN, abdomene, s.n. 1. Parte a corpului, între torace şi bazin, în care se găsesc stomacul, ficatul, pancreasul, splina, rinichii şi intestinele; pântece, burtă, foale. 2. (biol.) Partea posterioară a corpului la artropode. – Din fr., lat.… …   Dicționar Român

  • abdomen — abdomen, belly, stomach, paunch, gut are synonyms when naming the front part of the human trunk below the chest {crawl on his stomach} {crawl on his belly} {an appendectomy scar on his abdomen} In technical usage abdomen more specifically denotes …   New Dictionary of Synonyms

  • abdomen — m. anat. Región del tronco que forma una cavidad que se halla limitada en su parte superior por el diafragma, por una pared muscular en su parte frontal, por la columna vertebral en la región posterior y los huesos iliacos en su parte inferior.… …   Diccionario médico

  • Abdomen — Ab*do men, n. [L. abdomen (a word of uncertain etymol.): cf. F. abdomen.] 1. (Anat.) The belly, or that part of the body between the thorax and the pelvis. Also, the cavity of the belly, which is lined by the peritoneum, and contains the stomach …   The Collaborative International Dictionary of English

  • abdômen — s. m. 1.  [Anatomia] Parte do corpo humano que encerra os intestinos. (Divide se em três zonas: epigástrica, umbilical e hipogástrica.) 2.  [Entomologia] Parte posterior do corpo dos insetos. 3. Pança, barriga, ventre. • Sinônimo geral: ABDOME •… …   Dicionário da Língua Portuguesa

  • abdómen — s. m. 1.  [Anatomia] Parte do corpo humano que encerra os intestinos. (Divide se em três zonas: epigástrica, umbilical e hipogástrica.) 2.  [Entomologia] Parte posterior do corpo dos insetos. 3. Pança, barriga, ventre. • Sinônimo geral: ABDOME •… …   Dicionário da Língua Portuguesa

  • ABDOMEN — Graece ἐπιγάςριον, λαπάρα, ὑπόχοίλιον, quod sub umbilico est ad pubem. Item pinguedo quaevis, de qua hîc passim vocibus Adeps, Omentum, Trapeza etc. Crocodili Abdomen tam suaviter fragrare, ut moschum etiam superet, dicemus infrae voce Zahucha …   Hofmann J. Lexicon universale

  • abdomen — (n.) 1540s, belly fat, from L. abdomen belly, of unknown origin, perhaps from abdere conceal, with a sense of concealment of the viscera, or else what is concealed by proper dress. Purely anatomical sense is from 1610s. Zoological sense of… …   Etymology dictionary

  • abdomen — (Del lat. abdōmen). 1. m. Anat. vientre (ǁ cavidad del cuerpo de los vertebrados). En los mamíferos queda limitada por el diafragma. 2. Anat. vientre (ǁ conjunto de vísceras). 3. Zool. En muchos animales invertebrados, región que sigue al tórax;… …   Diccionario de la lengua española

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