Excavation of optic disk



excavation of optic disk n.
The normally occurring depression or pit in the center of the optic disk. Also called physiologic excavation.

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    [eks-kuh-vey-ter] /ˈɛks kəˌveɪ tər/ noun 1. a person or thing that . 2. a power-driven machine for digging, moving, or transporting loose gravel, sand, or soil. 3. a sharp, spoonlike instrument used for scraping out diseased tissue, as in dentistry. /ˈɛkskəˌveɪtə/ noun 1. a powered machine for digging earth, gravel, sand, etc, esp a caterpillar […]

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    [ik-seed-ns] /ɪkˈsid ns/ noun 1. the act or fact of something, especially a limit or standard: penalties for exceedance of air quality standards. 2. the amount by which something a limit or standard: a 10 percent exceedance.

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    [ik-seed-ns] /ɪkˈsid ns/ noun 1. the act or fact of something, especially a limit or standard: penalties for exceedance of air quality standards. 2. the amount by which something a limit or standard: a 10 percent exceedance.



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