That isn't correct. The pendulum definition was actually something called a "universal toise". Burattini suggested defining a unit called the metre based off of this, but it was found to be unworkable because it's not the same everywhere. A toise is ~1.949m.
The metre was _actually_ originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole. Obviously, that ended up having its own issues, hence the subsequent refinements until we settled on using the speed of light in a vacuum as the basis for it.
Nothing in what I said is incorrect. The original scientific definition of the meter is via a pendulum (1645), then it was refined via toises multiple times, and today it's defined via speed of light.
No, that's not correct, that unit while intended to be a universal measure of distance never was called a meter (the "inventor" wanted to call it "toise universalle"), all that comes from the wikipedia page you linked to, so the only remaining question is whether you can call it the "original definition".
I don't think you can call it the original definition, because (a) that definition never got any universal acceptance (not even among scientists), (b) didn't work (as it gave different results on different locations) and (c) wasn't particularly close in value to the current definition.
I understand, but the fun fact I mentioned, that the relation between pi and g is not accidental, stems from the earlier attempt to define the meter via a pendulum. Yes it was refined later many times, and it's why the relation between pi and g is not precise.
The metre was _actually_ originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole. Obviously, that ended up having its own issues, hence the subsequent refinements until we settled on using the speed of light in a vacuum as the basis for it.