Time to change the definition of "coin rotation"

Since the Euro people have now accepted the inevitable
and started having coins with zero rotation between
obverse and reverse, instead of the ugly and
counterintuitive 180 degrees, that leaves the US
as the only major country with that silly system.
I suggest therefore that, in view of the fact that
probably 90 percent of the world's population sees
zero rotation, this should henceforth be called
COIN ROTATION, and the wacky 180 degree system
can be called something else.
By the way, what is the origin of the 180 degree thing?