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RETINA
| Pronunciation (US): |  | (GB): | |
Irregular inflected form: retinae
I. (noun)
Sense 1
Meaning:
The innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve
Classified under:
Hypernyms ("retina" is a kind of...):
membrane; tissue layer (a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants)
Meronyms (parts of "retina"):
neuroepithelium (epithelium associated with special sense organs and containing sensory nerve endings)
fovea; fovea centralis (area consisting of a small depression in the retina containing cones and where vision is most acute)
parafovea (area of the retina immediately surrounding the fovea)
macula; macula lutea; macular area; yellow spot (a small yellowish central area of the retina that is rich in cones and that mediates clear detailed vision)
visual cell (one of the cells of the retina that is sensitive to light)
blind spot; optic disc; optic disk (the point where the optic nerve enters the retina; not sensitive to light)
cone; cone cell; retinal cone (a visual receptor cell in the retina that is sensitive to bright light and to color)
retinal rod; rod; rod cell (a visual receptor cell that is sensitive to dim light)
Holonyms ("retina" is a part of...):
eye; oculus; optic (the organ of sight)
Derivation:
retinal (in or relating to the retina of the eye)
Context examples:
A hereditary syndrome affecting the central nervous system that is associated with lesions of the skin and retina.
(Phakomatosis, NCI Thesaurus)
The nerve that carries messages from the retina to the brain.
(Optic nerve, NCI Dictionary)
Phosducin, encoded by the PDC gene, is a phosphoprotein that is located in the outer and inner segments of the rod cells in the retina.
(Phosducin, NCI Thesaurus/LocusLink)
A congenital or acquired defect characterized by the presence of a hole in the retina.
(Coloboma of the Retina, NCI Thesaurus)
A blood vessel-containing membrane of the eye that lies between the retina and the sclera.
(Choroid, NCI Thesaurus)
For this study, however, the researchers added a new component to the more common test: angiography, which allows doctors to distinguish red blood cells from other tissue in the retina.
(Predicting Alzheimer's Disease May Be Possible Using Eye Exam, The Titi Tudorancea Bulletin)
Abnormal growth of the cells of the retina without malignant characteristics.
(Benign Retinal Neoplasm, NCI Thesaurus)
The section of a photoreceptor within the retina between the outer and inner segment which contains altered nonmotile cilium.
(Connecting Segment of the Photoreceptor Cell, NCI Thesaurus)
One of the two photoreceptor cell types in the vertebrate retina.
(Cone, NLM, Medical Subject Headings)
A retinoblastoma characterized by the absence of a distinct retinal mass and the presence of malignant cells diffusely infiltrating the retina.
(Diffuse Retinoblastoma, NCI Thesaurus)
