follow Dictionary.com

11 Trending Words of 2014

night blindness

noun, Ophthalmology
1.
a condition of the eyes in which vision is normal in daylight but abnormally poor at night or in a dim light; nyctalopia.
Origin
1745-1755
1745-55
Related forms
nightblind, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
Examples from the web for night blindness
  • Researchers have already found the cause of a specific coloring that is also linked to a kind of night blindness.
  • night blindness may cause problems with driving in the evening or at night.
  • Many soldiers there suffered from night blindness because they hadn't eaten enough vegetables.
British Dictionary definitions for night blindness

night blindness

noun
1.
(pathol) a nontechnical term for nyctalopia
Derived Forms
nightblind, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
night blindness in Medicine

night blindness n.
See nyctalopia.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Encyclopedia Article for night blindness

failure of the eye to adapt promptly from light to darkness that is characterized by a reduced ability to see in dim light or at night. It occurs as a symptom of numerous congenital and inherited retinal diseases or as a result of vitamin A deficiency.

Learn more about night blindness with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source

Word of the Day

Difficulty index for night blindness

Few English speakers likely know this word

Word Value for night

9
10
Scrabble Words With Friends

Nearby words for night blindness