Petard
Pronunciation : Pe*tard"
Part of Speech : n.
Etymology : [F. p?tard, fr. p?ter to break wind, to crack, to explode, L. pedere, peditum.] (Mil.)
Definition : Defn: A case containing powder to be exploded, esp. a conical or cylindrical case of metal filled with powder and attached to a plank, to be exploded against and break down gates, barricades, drawbridges, etc. It has been superseded.
Source : Webster's Unabridged Dictionary, 1913