Is there a difference between a Pinon Seal and a Pinion Seal?

[thebigabd]

Is there a difference between a Pinon Seal and a Pinion Seal?

Thanks

[Toppack]

The difference is that one is Mis-Spelled and the other Isn't.
I've seen it both ways also, but I think Pinion is more correct.
I've also seen speedometer-geardrives called Pinon gears, but I doubt that is really correct either.