Bob Penoyer wrote:
There are certainly AC components in the waveform. But the sum of all
the components, including the DC component, never changes direction,
so the total signal is a DC signal. Here, "DC" does NOT mean
"constant"; it means unidirectional.

Anyone who went to university studying a natural science will know the
meaning of all of these terms and the others expose their ignorance by
speculating and making up instead. You clearly belong to the last category.
--
ciao Ban
Bordighera, Italy