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I would use the word "adiabatic" as meaning that no "action" can pass
through a "wall" -- usually the work of microscopic collisions of molecules
-- but the point asked about is well taken -- the handle of the propeller
does pass through the wall as do the wires from the battery to the
resistor. So I would now say that _I_ would mean by "adiabatic" that no
microscopic work is done by molecular collisions -- as _can_ be done though
the isothermal window, but that shafts and wires do not compromise the
barrier.