Backsaw

noun

1. A saw that is reinforced by a metal band along its back edge.
2. A saw the web of which is stiffened by a metallic back of greater substance. Such saws have specific names according to their use, as tenon-saw, dovetail-saw, carcass-saw, etc.
3. A saw (as a tenon saw) whose blade is stiffened by an added metallic back.
4. A handsaw that has a reinforcement along its back edge
5. a handsaw that is stiffened by metal reinforcement along the upper edge