noun (plural raphae pronunc. same )Anatomy & Biology
- 1A groove, ridge, or seam in an organ or tissue, typically marking the line where two halves fused in the embryo, in particular.More example sentences
- If the variant is bilateral the deviant muscle plate has a raphe in the median line.
- 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.
- 1.1The connecting ridge between the two halves of the medulla oblongata or the tegmentum of the midbrain.More example sentences
- Because most medullary raphe neurons that project to motoneurons are inhibited by vagal afferents.
- Second, there is a midbrain trigger, perhaps in serotonergic neurons of the dorsal raphe.
- In rats, the CO2-sensitive neurons of the caudal medullar raphe act during sleep only.
- 1.2 Botany A longitudinal ridge on the side of certain ovules or seeds.More example sentences
- The raphe is a slightly depressed area on the opposite side of the hilum from the micropyle.
- 1.3 Botany A longitudinal groove in the valve of many diatoms.More example sentences
- Through the raphe, the living diatom secretes mucilage, with which it may attach to a substrate or move by gliding over the substrate.
mid 18th century: modern Latin, from Greek rhaphē 'seam'.
More definitions of rapheDefinition of raphe in:
- The British & World English dictionary