Source : Webster's Revised Unabridged Dictionary (1913)

Zumbooruk \Zum*boo"ruk\, n. [Turk. & Ar. zamb[=u]rak, fr. Ar.
   zamb[=u]r a hornet.] (Mil.)
   A small cannon supported by a swiveled rest on the back of a
   camel, whence it is fired, -- used in the East.