Arquebus, or Harquebus, an early firearm. Several types of firearms were known by the name arquebus during the 16th and 17th centuries. All were fired from the shoulder or chest. The firing mechanism was originally a matchlock, a device that held a piece of burning wick and touched it to the powder in the gun when a trigger was pulled. Later, other firing arrangements were used.
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Coast Guard, United States, an armed force responsible for law enforcement, marine safety, aid to vessels and aircraft in distress, pollution control, and other duties in coastal waters and navigable rivers.