Petard

Pe‐tard″ (?), n. [F. pétard, fr. péter to break wind, to crack, to explode, L. pedere, peditum.] (Mil.) 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 It has been superseded.