| 词汇 | isthmus |
| 释义 | isthmus noun[ C ] specializeduk /ˈɪsθ.məs//ˈɪs.məs/ us /ˈɪsθ.məs//ˈɪs.məs/ isthmusnoun[C] (LAND)geography a narrow piece of land with water on each side that joins two larger areas of land: 地峡 the Isthmus of Panama巴拿马地峡 Roel Meijer/Photographer's Choice/GettyImages Geography: promontories & peninsulas arm cape Cape Cod causeway head headland panhandle peninsula peninsular point promontory sea stack spit stack tombolo isthmusnoun[C] (IN BODY)medical a narrow connection between two organ parts or structures in the body（身体）峡部 Substances & structures in the body abductor accessorius ACL actin adductor fundus funiculus fusiform glomerular glomerulus navicular neuroendocrine neurohormonal neurohormone nociceptive tendinous tendinum tendo tensor Th isthmus | American Dictionaryisthmus noun[ C ] us/ˈɪs·məs/ a narrow piece of land that has water on either side and joins two larger areas of land: the Isthmus of Panama Examples of isthmusisthmus Not all patients with interruption between the carotid and subclavian arteries have the deletion, and some, albeit very few, with interruption at the isthmus do. The balloon diameter was between the diameters of aortic isthmus and descending aorta at the level of diaphragm. Another potential carrier would have been ships' ballast, especially from ships that were wrecked at the isthmus. The diameter of the isthmus was found to be smaller, and the size of mitral valve annulus larger, than previously published values. Stimulation of the nucleus isthmi leads to time-varying electrical potentials in the optic tectum. When shedding of the oocyte(s) into the ampulla is imminent, stored spermatozoa are activated and released from the caudal isthmus in discrete numbers. The skin and bone above the tectum were opened to allow access to the nucleus isthmi, which lies below the tectum at its caudal pole. However, its application, safety, and efficacy in the setting of mild hypoplasia of the aortic isthmus has not been determined. Increased nuchal translucency in trisomy 21 fetuses; relation to narrowing of the aortic isthmus. Flow in the descending aorta just distal to the ductus arteriosus/aortic isthmus junction shows definite temporal differences and two distinct streams. Position of nerve ring, 0.396 - 0.440 from anterior end, just posterior to corpus, indicated by cluster of ganglia surrounding proximal margin of isthmus. Whilst reservations here primarily concern epithelial cells prepared from the oviduct ampulla, corresponding reservations would apply to epithelial cells from the isthmus. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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