# What property does the function hold which values equal the complex conjugate of the function with argument with opposite sign?$X(-\nu)=X^*(\nu)?$

I know that if

$$X(-\omega) = X(\omega),$$

then the function $$X$$ is even.

In general, if a signal $$x(t)$$ is real, then $$X(-\omega) = X^*(\omega).$$
What is the name of this property of $$X$$?