gouge

n. Chisel with a concave blade. v. (-ging) 1 cut with or as with a gouge. 2 (foll. By out) force out (esp. An eye with the thumb) with or as with a gouge. [latin gubia]

n. A chisel, with a hollow or semicylindrical blade, for scooping or cutting holes, channels, or grooves, in wood, stone, etc.; a similar instrument, with curved edge, for turning wood.