noun Psychology.

a property of perception in which there is a tendency to see parts of a visual field as solid, well-defined objects standing out against a less distinct background.


How can I figure out when to use some time, sometime, or sometimes?
Most often, sometime is one word: He will wash the car sometime.When some is used adjectivally with time to mean a short time, a long time, or an indefinite time, then it should be written as two words: She has not heard from her friend in some time. Related words that can be discussed here include the pronoun anyone and the adverb anytime which are …
More Than Trippy: Our Favorite Viral Optical Illusions Explained
What’s not to love about optical illusions? The magical, mysterious, mind-bending visuals never cease to evoke a series of ‘“woahs” and “what the’s--.” Words usually fail to describe them. Yet, one common word that is often used is trippy, hearkening to the psychedelic days of the ‘60s and ‘70s. But, believe it or not, the first optical illusions emerged far earlier, in the 5th century B.C. They even had Aristotle bumfuzzled! From Medieval Latin, opticus means “of sight or seeing” and ludere, “to play”—thus, optical illusions are visuals that essentially “play with one’s sight.” Because these images are invested with such mysterious power, we think optical illusions are some of the coolest didactic devices known to man. They’re brilliant to look at, and they teach us to question everything. So, to honor these powerful images, we want to share with you their proper names—because, honestly, trippy only holds up in the basement. Get your brains and eyeballs ready. They will be boggled.
READ MORE Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019