acceleration of gravity

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n. (Abbr. g)
The acceleration of freely falling bodies under the influence of terrestrial gravity, equal to approximately 9.81 meters (32 feet) per second per second.

acceleration of free fall

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Constant acceleration of a body falling freely under gravity, in a vacuum, or when air resistance is negligible. It varies slightly in different geographical locations as a result of differences in the distance from the centre of mass of the Earth. The standard accepted value, usually abbreviated as g, is 9.80 665 ms⁻¹ s⁻¹, or 32.17 feet s⁻¹ s⁻¹. Skydivers are sometimes said to be in free fall, but this is not strictly true, because their downward velocity is reduced by air resistance.

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For a list of words related to acceleration of gravity, see:

Principles of Mechanics, Waves, and Measurement - acceleration of gravity: change in velocity due to gravitational attraction

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American Heritage Dictionary The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved. Read