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noun Ophthalmology.
a condition of the eyes in which sight is normal in the night or in a dim light but is abnormally poor or wholly absent in the day or in a bright light.
Also called day blindness.
Origin:
1700–10; < Neo-Latin < Greek hēmeralōp- (stem of hēmerálōps having such a condition (hēmer(a) day +al(aós) blind + -ōps having such an appearance) + -ia -ia; compare -opia
1700–10; < Neo-Latin < Greek hēmeralōp- (stem of hēmerálōps having such a condition (hēmer(a) day +al(aós) blind + -ōps having such an appearance) + -ia -ia; compare -opia
Related forms
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source
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Link To hemeralopia
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Hemeralopia
has a plethora of syllables.
So is pneumonoultramicroscopicsilicovolcanoconiosis. Does it mean:
| an obscure term ostensibly referring to a lung disease caused by silica dust, sometimes cited as one of the longest words in the English language. |
| a white, crystalline, water-insoluble solid, C14H9Cl5, usually derived from chloral by reaction with chlorobenzene in the presence of fuming sulfuric acid: used as an insecticide and as a scabicide and pediculicide: agricultural use prohibited in the U.S. |
Collins
World English Dictionary
| hemeralopia (ˌhɛmərəˈləʊpɪə) | |
| —n | |
| Compare nyctalopia Nontechnical name: day blindness inability to see clearly in bright light | |
| [C18: New Latin, from Greek hēmeralōps, from hēmera day + alaos blind + ōps eye] | |
| hemeralopic | |
| —adj | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Medical Dictionary
hemeralopia hem·er·a·lo·pi·a (hěm'ər-ə-lō'pē-ə)
n.
A visual defect marked by the inability to see as clearly in bright light as in dim light. Also called day blindness.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
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