BENT a.
lined toward something, so as to be resolved, determined, set, etc.; -- said of the mind, character, disposition, desires, etc., and used with on; as, to be bent on going to college; he is bent on mischief.
BETA RAYS n.
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).