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annual variation

   Also found in: Dictionary/thesaurus 0.05 sec.
annual variation [′an·yə·wəl ver·ē′ā·shən]
(astronomy)
The change in the right ascension and declination of a star during one year, due to the combined effect of the star's proper motion and the precession of the equinoxes.
(geophysics)
A component in the change with time in the earth's magnetic field at a specified location that has a period of 1 year.


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? Mentioned in ? References in periodicals archive
 
Annual variation in proportion of penicillin-nonsusceptible isolates at hospitals in the Delaware Valley Annual no.
Spline interpolation is used in order to ensure that the curve representing the annual variation in temperature is smooth, which would not be the case if actual 30-year means were used.
 
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