bal·lis·tics

[buh-lis-tiks]
noun (usually used with a singular verb)
1.
the science or study of the motion of projectiles, as bullets, shells, or bombs.
2.
the art or science of designing projectiles for maximum flight performance.

Origin:
1745–55; see ballistic, -ics

bal·lis·ti·cian [bal-uh-stish-uhn] , noun
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
ballistics (bəˈlɪstɪks) [Click for IPA pronunciation guide]
 
n
(functioning as singular) the study of the flight dynamics of projectiles, either through the interaction of the forces of propulsion, the aerodynamics of the projectile, atmospheric resistance, and gravity (exterior ballistics), or through these forces along with the means of propulsion, and the design of the propelling weapon and projectile (interior ballistics)

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Ballistics is always a great word to know.
So is interrobang. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a stew of meat, vegetables, potatoes, etc.
Etymonline
Word Origin & History

ballistics
1753, from L. ballista "ancient military machine for hurling stones," from Gk. ballistes, from ballein "to throw, to throw so as to hit," also in a looser sense, "to put, place, lay;" from PIE base *gwele- "to throw, reach," in extended senses "to pierce" (cf. Skt. apa-gurya "swinging," balbaliti "whirls,
twirls;" Gk. bole "a throw, beam, ray," belemnon "dart, javelin," belone "needle"). Here, too, probably belongs Gk. ballizein "to dance," lit. "to throw one's body," ancient Gk. dancing being highly athletic.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
ballistics   (bə-lĭs'tĭks)  Pronunciation Key 
The scientific study of the characteristics of projectiles, such as bullets or missiles, and the way they move in flight.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
And they would have learned that this testimony was corroborated by ballistics
  findings.
It could have applications in medicine, forensics, ballistics and biometrics.
Ballistics tests that could confirm a match are pending.
The laboratory, ballistics unit and polygraph unit, whose.
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