Universal
From Applepedia
A Universal binary is an application that has been compiled with XCode and will run on Macs with both Intel and PowerPC processors. This is part of the transitioning process for the PPC to Intel switch. Universal is another term for a "Fat Binary," which were created back when Apple was switching from Motorola to PowerPC CPUs.
If an application that is to be run on an Intel Mac is not compiled as Universal, Rosetta will "morph" the code on the fly.


