Simple harmonic motion vs. harmonic motion

[cdot]

I know that simple harmonic motion is a type of periodic motion where the restorative force is directly proportional to the displacement so that the time evolution is sinusoidal but is there such a thing as just harmonic motion? 0r is harmonic motion just short for simple harmonic motion?

 

[mathman]

http://en.wikipedia.org/wiki/Harmonic_motion

You will get a lot of possibilities from the above.