Answer:
harmonic
Step-by-step explanation:
The frequency of a wave is given by
![f'=nf](https://img.qammunity.org/2021/formulas/physics/high-school/z3so59xslk78b78puwrhgoqldgojdrftml.png)
where
n = Order
when n = 1 it is the fundamental frequency, first harmonic, first partial
n = 2 it is the first overtone, second harmonic, second partial
n = 3 it is the second overtone, third harmonic, third partial
and so on
So, the overtone is the whole number multiple of the fundamental frequency is called a harmonic.