Bipennis
The Century Dictionary and Cyclopedia
noun.
An ancient ax with two blades, one on each side of the handle.
the GNU version of the Collaborative International Dictionary of English
noun.
An ax with an edge or blade on each side of the handle.
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
An
axe
with an
edge
or
blade
on each side of the
handle
.