from The American Heritage® Dictionary of the English Language, 4th Edition
- n. See night blindness.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The inability to see clearly in dim light; night blindness
from the GNU version of the Collaborative International Dictionary of English
- n. A disease of the eye, in consequence of which the patient can see well in a faint light or at twilight, but is unable to see during the day or in a strong light; day blindness.
- n. See moonblink.
from The Century Dictionary and Cyclopedia
- n. Night-blindness.
- n. Day-blindness.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder
Late Latin nyctalōpia, from Greek nuktalōps, night-blind : nux, nukt-, night; see nekw-t- in Indo-European roots + alaos, blind + ōps, ōp-, eye; see okw- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)