polar variation

polar variation

[′pō·lər ‚ver·ē′ā·shən]
(geophysics)
A small movement of the earth's axis of rotation relative to the geoid, the resultant of the Chandler wobble and other smaller movements.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Mentioned in ?