What is Dr, Device?

The humans' weapons have an enormous range, except for old versions of their newest weapon, called Little Doctor (or Dr. Device, which came about because of its scientific name, "Molecular Detachment Device," or M.D. Device). The Little Doctor splits apart molecules and causes a chain reaction in a spherical area, though it gets weaker as the radius increases and picks up strength when it hits new molecules. The M.D. Device can penetrate the buggers' shields.