• A fragment usually in the shape of a flake, detached from a larger mass by a blow through the action of weather, by pressure, or by expansion within the larger mass. A small spall involves a roughly circular depression not greater than 20 mm in depth nor 150 mm in any dimension; a large spall may be roughly circular or oval or, in some cases, elongated.


  • noun fragments of armour which are broken off and blasted into the interior of an armoured vehicle, as a result of a hit by an anti-tank projectile
  • acronymHESH