limit of the atmosphere

limit of the atmosphere

[′lim·ət əvthə ′at·mə‚sfir]
(geophysics)
The level at which the atmospheric density becomes the same as the density of interplanetary space, which is usually taken to be about one particle per cubic centimeter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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