I thought the 777 had 2 wing tanks, and a center fuel tank........
Never heard of a center wing fuel tank myself....
Well he's quite right McAero, it is usually referred to as the
centre-wing fuel tank. The wing is a single carry-though structure, so it's really regarded as one piece, with the bit in the middle, which happens to be in the fuselage, containing a fuel tank, hence the moniker
centre-wing fuel tank, so now you have heard it, right?