equatorial bulge

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equatorial bulge

[‚e·kwə′tȯr·ē·əl ′bəlj]
(geodesy)
The excess of the earth's equatorial diameter over the polar diameter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

equatorial bulge

The difference between the diameters of the earth at the equator and the poles. Because of this, the earth is an oblate spheroid.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved