phi Definition
- 1the twenty-first letter of the Greek alphabet (Φ, φ), transliterated as ‘ph’.
- 2the golden ratio or divine proportion, a mathematical concept used in art and design to create aesthetically pleasing proportions
Phrases with phi
an optical illusion that occurs when two or more stationary lights separated by a short distance are perceived as a single moving light
Example
The phi phenomenon is often used in movies to create the illusion of motion.
a number-theoretic function that counts the positive integers less than or equal to n that are relatively prime to n
Example
The phi function is used in number theory to study prime numbers.
a statistical measure of association between two binary variables, ranging from -1 to 1
Example
The phi coefficient is used in psychology to measure the relationship between two dichotomous variables.
Origins of phi
from the Greek letter 'phi'
Summary: phi in Brief
The term 'phi' [fʌɪ] refers to the twenty-first letter of the Greek alphabet, transliterated as 'ph', and the golden ratio or divine proportion, a mathematical concept used in art and design. It also extends into phrases like 'phi phenomenon,' an optical illusion, 'phi function,' a number-theoretic function, and 'phi coefficient,' a statistical measure of association.
