[ki-net-iks, kahy-]
noun (used with a singular verb) Physics.
the branch of mechanics that deals with the actions of forces in producing or changing the motion of masses.

1860–65; see kinetic, -ics Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
kinetics (kɪˈnɛtɪks, kaɪ-)
1.  another name for dynamics
2.  the branch of mechanics, including both dynamics and kinematics, concerned with the study of bodies in motion
3.  the branch of dynamics that excludes the study of bodies at rest
4.  the branch of chemistry concerned with the rates of chemical reactions

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

kinetics ki·net·ics (kə-nět'ĭks, kī-)

  1. The branch of mechanics concerned with the effects of forces on the motion of a body or system of bodies, especially of forces that do not originate within the system itself. Also called dynamics.

  2. The branch of chemistry concerned with the rates of change in the concentration of reactants in a chemical reaction.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
kinetics   (kə-nět'ĭks)  Pronunciation Key 
See dynamics.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica


branch of classical mechanics that concerns the effect of forces and torques on the motion of bodies having mass. Authors using the term kinetics apply the nearly synonymous name dynamics (q.v.) to the classical mechanics of moving bodies. This is in contrast to statics, which concerns bodies at rest, under equilibrium conditions. They include under dynamics both kinetics and kinematics (the description of motion in terms of position, velocity, and acceleration, apart from the influence of forces, torques, and masses). Authors not using the term kinetics divide classical mechanics into kinematics and dynamics, including statics as a special case of dynamics in which the sum of the forces and the sum of the torques are both zero.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Those engineers may be compared with the mainstream economists, who don't understand the real kinetics of macroeconomic phenomena.
In the study of kinetics, relative centers of gravity stimulate the development of anatomical structures.
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