Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A differential gravitational force acting along an extended body as a result of the varying distance from a gravitational source to the different parts of the body, such as the force of the moon on the earth's oceans closest to and farthest from the moon.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun physics any of various
gravitational forces acting on a body caused byvariation in thedistance between it and a source of agravitational field ; such forces due to theMoon are responsible fortides
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