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also ce·lom (sē′ləm)
n. pl. coeloms or coe·lo·ma·ta (-lə-mä′tə, -măt′ə) also ce·loms or ce·loma·ta
The fluid-filled cavity within the body of most multicellular animals, except some invertebrates such as flatworms and cnidarians, that lies between the body wall and the digestive tract and is formed by the splitting of the embryonic mesoderm into two layers. Also called body cavity.

[German Koelom, from Greek koilōma, cavity, from koilos, hollow; see keuə- in Indo-European roots.]

coe·lom′ic (sĭ-lŏm′ĭk, -lō′mĭk) adj.


(ˈsiːləʊm; -ləm) or


(Zoology) the body cavity of many multicellular animals, situated in the mesoderm and containing the digestive tract and other visceral organs
[C19: from Greek koilōma cavity, from koilos hollow; see coel-]
coelomic, celomic adj


(ˈsi ləm)

also coe•lome


n., pl. coe•loms, coe•lo•ma•ta (sɪˈloʊ mə tə) also coe•lomes.
the body cavity of higher metazoans, between the body wall and intestine, lined with a mesodermal epithelium.
[1875–80; < Greek koílōma cavity =koilō-, variant s. of koiloûn to hollow out, v. derivative of koîlos hollow + -ma n. suffix of result]
coe•lom•ic (sɪˈlɒm ɪk, -ˈloʊ mɪk) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.coelom - a cavity in the mesoderm of an embryo that gives rise in humans to the pleural cavity and pericardial cavity and peritoneal cavitycoelom - a cavity in the mesoderm of an embryo that gives rise in humans to the pleural cavity and pericardial cavity and peritoneal cavity
bodily cavity, cavum, cavity - (anatomy) a natural hollow or sinus within the body
References in periodicals archive ?
Within the caudal coelom there was a 65-g blood clot.
Initial external examination of the carcass revealed a weight of 650 g, a very distended coelom, and evidence of regurgitation around the beak.
5 ml of free clear fluid was present in the coelom of the female.
An ultrasound revealed intracoelomic fluid, and hemorrhagic fluid was aspirated from the coelom.
The ductus deferens is a tortuous tubule, which originates in the epididymis on the dorsal aspect of the testis, runs alongside the ureter, across the dorsal aspect of the coelom, and penetrates the dorsal wall of the urodeum, where it forms the short papilla of the ductus deferens.
Pulmonary crackles were heard dorsally and bilaterally, and the coelom was markedly distended, with a palpable fluid wave and no masses.
Coelios-copy was not performed because of the limited air space present in the coelom in this particular case.
This report describes a case of dysgerminoma in a 21-year-old eastern rosella (Platycercus eximius eximius) that presented with dyspnea and a severely distended coelom.
The synostosis is typically excised with rongeurs or an air drill, and a fat pad, usually harvested from the subcutaneous fat overlying the coelom, is placed between the radius and ulna to prevent reformation of a bony bridge (P.
20,24) Respiratory distress was presumably caused by the large quantities of fluid in the coelom pressing against the air sacs and lung parenchyma, which reduced the available respiratory volume and prevented normal air flow.
The liver lobe may have initially acted as a patch to prevent leakage into the coelom.