BEAT n.
A cheat or swindler of the lowest grade; -- often emphasized by dead; as, a dead beat. [Low] Beat of drum (Mil.), a succession of strokes varied, in different ways, for particular purposes, as to regulate a march, to call soldiers to their arms or quarters, to direct an attack, or retreat, etc. -- Beat of a watch, or…
BETA RAYS n.
Penetrating rays readily deflected by a magnetic or electric field, emitted by radioactive substances, as radium. They consist of negatively charged particles or electrons, apparently the same in kind as those of the cathode rays, but having much higher velocities (about 35,000 to 180,000 miles per second).…