Definition of coelom in English:

coelom

nounPlural coelomata, Plural coelomsˈsiːləmˈsēləm

Zoology

The principal body cavity in most animals, located between the intestinal canal and the body wall.
Example sentencesExamples
- The coelom extends into the rays, where the gonads are located.
- The ophiuroid coelom is strongly reduced, particularly in comparison to other echinoderms.
- Flatworms are unsegmented, bilaterally symmetrical worms that lack a coelom but that do have three germ layers.
- In mellitids, the intestine is separated from the rest of the coelom by a well-defined wall of the peripheral ballast system.
- Except in leeches, the coelom is partially subdivided by septa.

Derivatives

coelomate

noun & adjective

Zoology

This animal would have to be relatively large since the coelomate condition cannot have evolved in a tiny animal.
Example sentencesExamples
- Such a radical change in the mitochondrial gene arrangement within a closely related taxon has never been observed in other coelomate phyla.
- They first evolved in the earlier Cambrian period, as part of the great radiation of coelomate animals that occurred at that time.
- The genes have an arrangement relatable to those of coelomate metazoans, but not to those of secernentean nematodes.
- Schizocoelous mesoderm formation in coelomate spiralians also makes use of individual cell immigration during its early phase.

coelomic

adjectivesəˈlɒmɪk

Zoology

A number of other volatile, low molecular mass compounds were found in the coelomic fluid of these and other nereid species and thought to play a role in their reproduction.
Example sentencesExamples
- The soft parts in the axial canal of the stem consist of nerve cords, coelomic cavities, and associated organs which require more metabolic maintenance.
- The reproductive system is composed of a single saccular gonad in a coelomic pouch lying dorsal to the digestive system.
- Embryonic coelomic structures have specific fates as the bilaterally symmetrical larvae metamorphose into radially symmetric adults.
- These characters would have facilitated volume changes of the coelomic cavity due to dorso-ventral rotation of the ‘synsacrum’ on the dorsal vertebrae.

Origin

Late 19th century: from Greek koilōma 'cavity'.

Definition of coelom in US English:

coelom

(also celom)

nounˈsēləm

Zoology

The body cavity in metazoans, located between the intestinal canal and the body wall.
Example sentencesExamples
- The coelom extends into the rays, where the gonads are located.
- Flatworms are unsegmented, bilaterally symmetrical worms that lack a coelom but that do have three germ layers.
- In mellitids, the intestine is separated from the rest of the coelom by a well-defined wall of the peripheral ballast system.
- Except in leeches, the coelom is partially subdivided by septa.
- The ophiuroid coelom is strongly reduced, particularly in comparison to other echinoderms.

Origin

Late 19th century: from Greek koilōma ‘cavity’.

单词	coelom
释义	Definition of coelom in English: coelom nounPlural coelomata, Plural coelomsˈsiːləmˈsēləm Zoology The principal body cavity in most animals, located between the intestinal canal and the body wall. Example sentencesExamples The coelom extends into the rays, where the gonads are located. The ophiuroid coelom is strongly reduced, particularly in comparison to other echinoderms. Flatworms are unsegmented, bilaterally symmetrical worms that lack a coelom but that do have three germ layers. In mellitids, the intestine is separated from the rest of the coelom by a well-defined wall of the peripheral ballast system. Except in leeches, the coelom is partially subdivided by septa. Derivatives coelomate noun & adjective Zoology This animal would have to be relatively large since the coelomate condition cannot have evolved in a tiny animal. Example sentencesExamples Such a radical change in the mitochondrial gene arrangement within a closely related taxon has never been observed in other coelomate phyla. They first evolved in the earlier Cambrian period, as part of the great radiation of coelomate animals that occurred at that time. The genes have an arrangement relatable to those of coelomate metazoans, but not to those of secernentean nematodes. Schizocoelous mesoderm formation in coelomate spiralians also makes use of individual cell immigration during its early phase. coelomic adjectivesəˈlɒmɪk Zoology A number of other volatile, low molecular mass compounds were found in the coelomic fluid of these and other nereid species and thought to play a role in their reproduction. Example sentencesExamples The soft parts in the axial canal of the stem consist of nerve cords, coelomic cavities, and associated organs which require more metabolic maintenance. The reproductive system is composed of a single saccular gonad in a coelomic pouch lying dorsal to the digestive system. Embryonic coelomic structures have specific fates as the bilaterally symmetrical larvae metamorphose into radially symmetric adults. These characters would have facilitated volume changes of the coelomic cavity due to dorso-ventral rotation of the ‘synsacrum’ on the dorsal vertebrae. Origin Late 19th century: from Greek koilōma 'cavity'. Definition of coelom in US English: coelom (also celom) nounˈsēləm Zoology The body cavity in metazoans, located between the intestinal canal and the body wall. Example sentencesExamples The coelom extends into the rays, where the gonads are located. Flatworms are unsegmented, bilaterally symmetrical worms that lack a coelom but that do have three germ layers. In mellitids, the intestine is separated from the rest of the coelom by a well-defined wall of the peripheral ballast system. Except in leeches, the coelom is partially subdivided by septa. The ophiuroid coelom is strongly reduced, particularly in comparison to other echinoderms. Origin Late 19th century: from Greek koilōma ‘cavity’.
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