from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Luminous at night. Used especially of certain high clouds.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Shining or glowing at night, especially of very high-altitude clouds that reflect sunlight long after sunset.
from The Century Dictionary and Cyclopedia
- Shining by night or in the dark; nuctilucid: as, the noctilucent eyes of a cat.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. shining or glowing by night
Sorry, no etymologies found.