Harquebus \Har"que*bus\ Harquebuse \Har"que*buse\
(h[aum]r"kw[-e]*b[u^]s), n. [See {Arquebus}.]
A firearm with match holder, trigger, and tumbler, made in
the second half of the 15th century. The barrel was about
forty inches long. A form of the harquebus was subsequently
called {arquebus with matchlock}.
[1913 Webster]