variation : Idioms & Phrases
Index
Annual variation
(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.
Webster 1913
Calculus of variations
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noun the calculus of maxima and minima of definite integrals
WordNet
- a branch of mathematics in which the laws of dependence which bind the variable quantities together are themselves subject to change.
Webster 1913
daily variation
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noun fluctuations that occur between one day and the next
WordNet
diurnal variation
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noun fluctuations that occur during each day
WordNet
Geographical variation
- any variation of a species which is dependent on climate or other geographical conditions.
Webster 1913
magnetic variation
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noun the angle (at a particular location) between magnetic north and true north
variation; magnetic declination.
WordNet
Variation compass
- . See under
Compass .
Webster 1913
Variation of the moon
(Astron.) , an inequality of the moon's motion, depending on the angular distance of the moon from the sun. It is greater at the octants, and zero at the quadratures.
Webster 1913
Variation of the needle
(Geog. & Naut.) , the angle included between the true and magnetic meridians of a place; the deviation of the direction of a magnetic needle from the true north and south line; called alsodeclination of the needle .
