Definition of ostium in English:

ostium

nounPlural ostia ˈɒstɪəmˈästēəm

Anatomy Zoology

1An opening into a vessel or cavity of the body.
Example sentencesExamples
- An ascending dissection occasionally can occlude the ostium of a coronary artery and lead to myocardial infarction.
- Accessory ostia of the maxillary sinus are found in about 30% of skulls; as many as three in one skull have been reported.
- The ostium leads to the second portion of the oviduct, the ampulla, which is the duct's dilated mid-portion where fertilization usually occurs.
- The location of the left-sided ostia of the lesions would be unusual for diverticula.
- The latter arise from the paranasal sinuses and protrude into the nasopharynx through the sinus ostia.
Synonyms
opening, orifice, aperture, hole, outlet, inlet, vent
1. 1.1 Each of a number of pores in the wall of a sponge, through which water is drawn in.
  Example sentencesExamples
  Both the sponges from Wyoming and those from the Great Basin have trabs of essentially the same size, as well as canals and ostia in the outer wall of essentially the same diameter.
  Water enters through pores called ostia, flows through canals to a spacious chamber called a spongocoel, and finally exits through large openings called oscula.
  For instance, many arthropods have lost extensive metamerism but still have remnants in the form of repeated organs (such as the limbs in cladocerans and spiders, or the heart ostia in a spider opisthosoma).
  Because of their lack of a continuous outer membrane and their lack of defined ostia, hexactinellids lack control over how much water passes through them.
  Brianispongia has numerous inhalant ostia or pores and scattered exhalant exopores, as in the Wyoming sponge.

Origin

Early 17th century: from Latin, 'door, opening'.

Definition of ostium in US English:

ostium

nounˈästēəm

Anatomy Zoology

1An opening into a vessel or cavity of the body.
Example sentencesExamples
- The ostium leads to the second portion of the oviduct, the ampulla, which is the duct's dilated mid-portion where fertilization usually occurs.
- Accessory ostia of the maxillary sinus are found in about 30% of skulls; as many as three in one skull have been reported.
- An ascending dissection occasionally can occlude the ostium of a coronary artery and lead to myocardial infarction.
- The location of the left-sided ostia of the lesions would be unusual for diverticula.
- The latter arise from the paranasal sinuses and protrude into the nasopharynx through the sinus ostia.
Synonyms
opening, orifice, aperture, hole, outlet, inlet, vent
1. 1.1 Each of a number of pores in the wall of a sponge, through which water is drawn in.
  Example sentencesExamples
  Water enters through pores called ostia, flows through canals to a spacious chamber called a spongocoel, and finally exits through large openings called oscula.
  For instance, many arthropods have lost extensive metamerism but still have remnants in the form of repeated organs (such as the limbs in cladocerans and spiders, or the heart ostia in a spider opisthosoma).
  Because of their lack of a continuous outer membrane and their lack of defined ostia, hexactinellids lack control over how much water passes through them.
  Brianispongia has numerous inhalant ostia or pores and scattered exhalant exopores, as in the Wyoming sponge.
  Both the sponges from Wyoming and those from the Great Basin have trabs of essentially the same size, as well as canals and ostia in the outer wall of essentially the same diameter.

Origin

Early 17th century: from Latin, ‘door, opening’.

单词	ostium
释义	Definition of ostium in English: ostium nounPlural ostia ˈɒstɪəmˈästēəm Anatomy Zoology 1An opening into a vessel or cavity of the body. Example sentencesExamples An ascending dissection occasionally can occlude the ostium of a coronary artery and lead to myocardial infarction. Accessory ostia of the maxillary sinus are found in about 30% of skulls; as many as three in one skull have been reported. The ostium leads to the second portion of the oviduct, the ampulla, which is the duct's dilated mid-portion where fertilization usually occurs. The location of the left-sided ostia of the lesions would be unusual for diverticula. The latter arise from the paranasal sinuses and protrude into the nasopharynx through the sinus ostia. Synonyms opening, orifice, aperture, hole, outlet, inlet, vent 1.1 Each of a number of pores in the wall of a sponge, through which water is drawn in. Example sentencesExamples Both the sponges from Wyoming and those from the Great Basin have trabs of essentially the same size, as well as canals and ostia in the outer wall of essentially the same diameter. Water enters through pores called ostia, flows through canals to a spacious chamber called a spongocoel, and finally exits through large openings called oscula. For instance, many arthropods have lost extensive metamerism but still have remnants in the form of repeated organs (such as the limbs in cladocerans and spiders, or the heart ostia in a spider opisthosoma). Because of their lack of a continuous outer membrane and their lack of defined ostia, hexactinellids lack control over how much water passes through them. Brianispongia has numerous inhalant ostia or pores and scattered exhalant exopores, as in the Wyoming sponge. Origin Early 17th century: from Latin, 'door, opening'. Definition of ostium in US English: ostium nounˈästēəm Anatomy Zoology 1An opening into a vessel or cavity of the body. Example sentencesExamples The ostium leads to the second portion of the oviduct, the ampulla, which is the duct's dilated mid-portion where fertilization usually occurs. Accessory ostia of the maxillary sinus are found in about 30% of skulls; as many as three in one skull have been reported. An ascending dissection occasionally can occlude the ostium of a coronary artery and lead to myocardial infarction. The location of the left-sided ostia of the lesions would be unusual for diverticula. The latter arise from the paranasal sinuses and protrude into the nasopharynx through the sinus ostia. Synonyms opening, orifice, aperture, hole, outlet, inlet, vent 1.1 Each of a number of pores in the wall of a sponge, through which water is drawn in. Example sentencesExamples Water enters through pores called ostia, flows through canals to a spacious chamber called a spongocoel, and finally exits through large openings called oscula. For instance, many arthropods have lost extensive metamerism but still have remnants in the form of repeated organs (such as the limbs in cladocerans and spiders, or the heart ostia in a spider opisthosoma). Because of their lack of a continuous outer membrane and their lack of defined ostia, hexactinellids lack control over how much water passes through them. Brianispongia has numerous inhalant ostia or pores and scattered exhalant exopores, as in the Wyoming sponge. Both the sponges from Wyoming and those from the Great Basin have trabs of essentially the same size, as well as canals and ostia in the outer wall of essentially the same diameter. Origin Early 17th century: from Latin, ‘door, opening’.
随便看	gainfulness gainfulness gainfulnesses gain-giving gain ground gain ground gain ground on gain ground on gain in gain in gaining gain in momentum gain-legged depreciable depreciable depreciate depreciated depreciates depreciating depreciatingly depreciation depreciation depreciations depreciative depreciative