auroral oval
McGraw-Hill Science & Technology Dictionary:
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auroral oval
(ə′rör·əl ′ō·vəl)
(geophysics) An oval-shaped region centered on the earth's magnetic pole in which auroral emissions occur.
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McGraw-Hill Science & Technology Dictionary
McGraw-Hill Dictionary of Scientific and Technical Terms. Copyright © 2003, 1994, 1989, 1984, 1978, 1976, 1974 by McGraw-Hill Companies, Inc. All rights reserved.
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