ballistics

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The study of the dynamics of projectiles.
• noun The study of the flight characteristics of projectiles.
• noun The study of the functioning of firearms.
• noun The study of the firing, flight, and effects of ammunition.
• adjective Of, relating to, or engaging in the study of ballistics.

from The Century Dictionary.

• noun The science or art of discharging large missiles by the use of the ballista or other engine.
• noun The science of the motion of projectiles.

from the GNU version of the Collaborative International Dictionary of English.

• noun The science or art of hurling missile weapons by the use of an engine.
• noun The science treating the motion of projectiles in flight, especially when they are in free fall within the earth's gravitational field.
• noun The study of the characteristics of a cartridge fired from a firearm, and of the processes occurring during the discharge of a firearm.
• noun The division within a police department which studies the characteristics of cartridges fired from a firearm; the ballistics department. The characteristics of the weapons and bullets fired may be used as evidence in criminal investigations.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun physics The science of objects that predominately fly under the effects of gravity, momentum and atmospheric drag, and dealing with details of their behaviour at the origin and destination of their flight, as of bullets or missiles or rockets.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the science of flight dynamics
• noun the trajectory of an object in free flight