noun Download 🔗Share Φ, the 21st letter of the Euclidean and modern Greek alphabet, usually romanized as "ph". Examples : "In Greek class, we learned that phi looks like a circle with a vertical line through it. " language word sign Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share The golden ratio. Examples : "Many artists believe that shapes with proportions close to phi are the most visually pleasing. " math number philosophy art Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share A visual illusion whereby a sequential pattern of lights produces a false sense of motion. Examples : "The old movie theater's marquee used a series of flashing bulbs to create a phi, making it look like the lights were chasing each other around the sign. " phenomena sensation physics mind technology science Chat with AIVocabulary GamePractice Reading
