No, it is not. It is the act of granting non-reciprocal concessions to demonstrated or potential enemies in order to maintain peace.
You make me giggle.
With appeasement the reciprocation to the concession(s) is supposed to be peace.
I have even checked a few different sources and "non-reciprocal" hasn't appeared in any of the definitions for appeasment (so please cite a credible source for your expanded definition).