One of the key techniques for playing the original Doom games was to stand with a wall, column, or other terrain feature between the monsters and you, such that your ray-traced bullets passed through, but enemies shooting fireballs or other projectiles with size were blocked. Arachnotrons were particularly susceptible to this exploit. I'm sure a thousand other games have this phenomena, though hopefully modern AI is smarter about moving when the target is blocked.
Is there a term for this technique?
To be clear, I'm not talking about simply using cover, or dodging out from cover to take a shot and then retreating, but rather situations were you can stand still and cherry-tap the target to oblivion with your pistol, perfectly safe.