harmonic

1. A component frequency of the signal of a wave that is an integer multiple of the fundamental frequency.
2. The place where, on a bowed string instrument, a note in the harmonic series of a particular string can be played without the fundamental present.
3. One of a class of functions that enter into the development of the potential of a nearly spherical mass due to its attraction.
4. One's child.

الجمع harmonics