What bone in the cow is the "T-bone"? Is it part of the spine, pelvis or what?
It comes from the spine, but is difficult to realise when it is in the shop/on your plate.
The T in the T bone is named because the spinal processes are at roughly
Taken from the nose to tail app.
Typically a t bone is quite far down the cow, as shown here as the short loin:
Taken from Wikipedia, beef cut