from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The point in or near a body at which the gravitational potential energy of the body is equal to that of a single particle of the same mass located at that point and through which the resultant of the gravitational forces on the component particles of the body acts.
- noun The point of greatest importance, interest, or activity.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun physics a
point, near or withina body, through which its weightcan be assumedto act when considering forces on the body and its motion under gravity. This coincides with the center of massin a uniform gravitational field
- noun any pivotal or central idea or group.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun the point within something at which gravity can be considered to act; in uniform gravity it is equal to the center of mass
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