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retinal cone |
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cone (kōn) 1. a solid figure or body having a circular base and tapering to a point. 2. retinal c. 3. in radiology, a conical or open-ended cylindrical structure used as an aid in centering the radiation beam and as a guide to source-to-film distance. 4. in root canal therapy, a solid substance with a tapered form, usually made of gutta-percha or silver, fashioned to conform to the shape of a root canal. cone of light the triangular reflection of light seen on the tympanic membrane. retinal cone one of the specialized conical or flask-shaped outer segments of the visual cells, which, with the retinal rods, form the light-sensitive elements of the retina. twin cones retinal cone cells in which two cells are blended.
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retinaculum tendinum retinal retinal adaptation retinal anlage tumor retinal arterial occlusion Retinal Artery Occlusion retinal break retinal cone retinal corresponding points retinal densitometry retinal detachment retinal dialysis retinal embolism retinal fissure retinal haemangioma |
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