from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A visually perceived image that is deceptive or misleading.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An image that is visually deceptive or misleading.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an optical phenomenon that results in a false or deceptive visual impression
Sorry, no etymologies found.
“second inequality,” i.e. the optical illusion caused by the earth's annual motion, but first revived an old idea of his own that for the sake of uniformity the sun, or as he preferred to regard it, the earth, should have an equant as well as the planets.
Anyone less motivated would not have found the ancient fumarole, its volcanic vapors long since spent, for it lay behind a seemingly uninterrupted wall of basalt formed in tall columnar crystals; nose down, Publius Vagiennius sniffed his way around an optical illusion and found a huge chimney.