- a mattock with one arm like that of an adz and the other like that of an ax.
- Archaic. a double-bladed battle-ax.
Origin of twibill
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a mattock with a blade shaped like an adze at one end and like an axe at the other
- archaic a double-bladed battle-axe
Old English, from twi- two, double + bill sword, bill ³