Twibil
Twi´bil
n. 1. A kind of mattock, or ax; esp., a tool like a pickax, but having, instead of the points, flat terminations, one of which is parallel to the handle, the other perpendicular to it.
2. A tool for making mortises.
3. A reaping hook.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.