eiˈgenfunction noun

A solution of a wave function that satisfies a set of boundary conditions

eiˈgentone noun (physics)

A tone characteristic of a particular vibrating system

eiˈgenvalue noun (mathematics and physics)

Any of the possible values for a parameter of an equation for which the solutions will be compatible with the boundary conditions

eiˈgenvector noun (mathematics and physics)

A vector that when transformed by a matrix retains its direction but not necessarily its length