| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024ret•i•na /ˈrɛtənə/USA pronunciation n. [countable], pl. ret•i•nas, ret•i•nae /ˈrɛtəˌni/.USA pronunciation - Ophthalmologythe innermost coat of the back part of the eyeball that receives the image produced by the lens:The retina meets the optic nerve.
WordReference Random House Unabridged Dictionary of American English © 2024ret•i•na (ret′n ə, ret′nə),USA pronunciation n., pl. ret•i•nas, ret•i•nae (ret′n ē′).USA pronunciation [Anat.]- Anatomythe innermost coat of the posterior part of the eyeball that receives the image produced by the lens, is continuous with the optic nerve, and consists of several layers, one of which contains the rods and cones that are sensitive to light. See diag. under eye.
- Medieval Latin rētina, perh. equivalent. to Latin rēt- (stem of rēte) net + -ina -ine1
- Middle English ret(h)ina 1350–1400
- Trademarks, Drugsa brand of tretinoin, used esp. to reduce wrinkles caused by overexposure to the sun.
Collins Concise English Dictionary © HarperCollins Publishers:: retina /ˈrɛtɪnə/ n ( pl -nas, -nae / -ˌniː/)- the light-sensitive membrane forming the inner lining of the posterior wall of the eyeball, composed largely of a specialized terminal expansion of the optic nerve. Images focused here by the lens of the eye are transmitted to the brain as nerve impulses
Etymology: 14th Century: from Medieval Latin, perhaps from Latin rēte netˈretinal adj |