Actually a throttle body on a port injected car never see's any fuel.
A throttle body on ThrottleBody Injection(TBI) will see fuel because the injectors and before the throttle plate & base.
The throttle body is basically the area or even complete piece that contains the throttle plate & rod, throttle base, and air horn if applicable.
It also can have an array of other parts attached or integrated into it (TPS, IAC, EGR, linkage, etc)
