Noun
Ellipsis of main battle tank.
Coordinate term: tank
A tracked armoured fighting vehicle designed for direct ground combat, instead of a support role or indirect combat or non-ground combat role
Coordinate terms: (non direct ground combat tanks) support tank, training tank
Coordinate terms: (direct ground combat tanks) light tank, medium tank, heavy tank, superheavy tank, infantry tank, cavalry tank, main battle tank
He's found a teapot and milk and is brewing up, because that's what the English do when they've just broken out of military prison one jump ahead of murderous assassins from an alien death god cult, then survived being shot at by a main battle tank. Charles Stross
Interestingly, this included the T-80U Main Battle Tank. Source: Internet