variation : Idioms & Phrases

• (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

• 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

• noun fluctuations that occur between one day and the next
  

WordNet

• noun fluctuations that occur during each day
  

WordNet

• any variation of a species which is dependent on climate or other geographical conditions.

Webster 1913

• noun the angle (at a particular location) between magnetic north and true north
  variation; magnetic declination.
  

WordNet

• . See under Compass.

Webster 1913

• (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

• (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 also declination of the needle.

Webster 1913