c. Forming part of the name of various modifications of tools or apparatus which have the blade, or other part bent to adapt them to special purposes: as bent-gauge, bent-gouge, bent-graver, bent-rasp, which have a bent or curved blade; bent-levern. a lever of the first kind, whose arms form an angle with each other, as a bell-crank lever.bent-lever balancen. a balance having a short bent arm bearing a scale, and a long weighted arm the leverage of which increases as it ascends, ending in an index pointing to divisions in a graduated arc.