Bow"-com`pass (?), n.; pl.
Bow-compasses (?).
1. An arcograph.
2. A small pair of compasses, one leg of which
carries a pencil, or a pen, for drawing circles. Its legs are often
connected by a bow-shaped spring, instead of by a joint.
3. A pair of compasses, with a bow or arched plate
riveted to one of the legs, and passing through the other.