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单词 raphe
释义

Definition of raphe in English:

raphe

nounPlural raphae ˈreɪfiˈrāfē
  • 1Anatomy Biology
    A groove, ridge, or seam in an organ or tissue, typically marking the line where two halves fused in the embryo.

    Example sentencesExamples
    • They are located close to the median raphe, ventromedial to the hypoglossal nucleus.
    • If the variant is bilateral the deviant muscle plate has a raphe in the median line.
    • Its fibers pass dorsally from an extensive anterior attachment to insert on the pharyngeal raphe, the pharyngeal tubercle of the occipital bone.
    1. 1.1 The connecting ridge between the two halves of the medulla oblongata or the tegmentum of the midbrain.
      Example sentencesExamples
      • Because most medullary raphe neurons that project to motoneurons are inhibited by vagal afferents.
      • The second pathway arises from the median raphe and enervates the hippocampus and appears to mediate resilience and adaptation to stress.
      • Second, there is a midbrain trigger, perhaps in serotonergic neurons of the dorsal raphe.
      • Stimulation of 5 - HT1A receptors in the raphe regulates serotonin synthesis and release.
      • In rats, the CO2-sensitive neurons of the caudal medullar raphe act during sleep only.
  • 2Botany
    A longitudinal ridge on the side of certain ovules or seeds.

    Example sentencesExamples
    • The raphe is a slightly depressed area on the opposite side of the hilum from the micropyle.
    1. 2.1 A longitudinal groove in the valve of many diatoms.
      Example sentencesExamples
      • Through the raphe, the living diatom secretes mucilage, with which it may attach to a substrate or move by gliding over the substrate.

Origin

Mid 18th century: modern Latin, from Greek rhaphē 'seam'.

 
 

Definition of raphe in US English:

raphe

nounˈrāfē
  • 1Anatomy Biology
    A groove, ridge, or seam in an organ or tissue, typically marking the line where two halves fused in the embryo.

    Example sentencesExamples
    • They are located close to the median raphe, ventromedial to the hypoglossal nucleus.
    • Its fibers pass dorsally from an extensive anterior attachment to insert on the pharyngeal raphe, the pharyngeal tubercle of the occipital bone.
    • If the variant is bilateral the deviant muscle plate has a raphe in the median line.
    1. 1.1 The connecting ridge between the two halves of the medulla oblongata or the tegmentum of the midbrain.
      Example sentencesExamples
      • Stimulation of 5 - HT1A receptors in the raphe regulates serotonin synthesis and release.
      • In rats, the CO2-sensitive neurons of the caudal medullar raphe act during sleep only.
      • Because most medullary raphe neurons that project to motoneurons are inhibited by vagal afferents.
      • The second pathway arises from the median raphe and enervates the hippocampus and appears to mediate resilience and adaptation to stress.
      • Second, there is a midbrain trigger, perhaps in serotonergic neurons of the dorsal raphe.
  • 2Botany
    A longitudinal ridge on the side of certain ovules or seeds.

    Example sentencesExamples
    • The raphe is a slightly depressed area on the opposite side of the hilum from the micropyle.
    1. 2.1 A longitudinal groove in the valve of many diatoms.
      Example sentencesExamples
      • Through the raphe, the living diatom secretes mucilage, with which it may attach to a substrate or move by gliding over the substrate.

Origin

Mid 18th century: modern Latin, from Greek rhaphē ‘seam’.

 
 
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更新时间:2024/12/22 23:56:17