wave-function

wave function

noun Physics.
1.
a solution of a wave equation.
2.
(in quantum mechanics) a mathematical function, found by solving a quantum-mechanical wave equation, that is used to predict the outcome of measurements on physical systems.
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World English Dictionary
wave function
 
n
physics ψ a mathematical function of position and generally time, used in wave mechanics to describe the state of a physical system

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
wave function  
A mathematical function used in quantum mechanics to describe the propagation of the wave associated with a particle or group of particles. The wave function is a solution to Schrödinger's equation, given the boundary conditions that describe the physical system in which the particle is found. The square of the absolute value of the function evaluated at a given point in space is proportional to the probability of finding the particle in the immediate vicinity of that position.
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