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Annual variation

   Also found in: Encyclopedia 0.02 sec.
(Astron.) the yearly change in the right ascension or declination of a star, produced by the combined effects of the precession of the equinoxes and the proper motion of the star.

See also: Variation



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Differentiation in chum salmon allele frequencies among regions and populations within regions was approximately 18 times greater than that of annual variation within populations.
Less than 20 percent of the annual variation in per-capita consumption can be explained by changes in the level of efficiency savings, while energy prices explain 40 percent of the annual variation.
 
 
 
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