[1] : The Collaborative International Dictionary of English v.0.48

variation \va`ria"tion\, n. oe. variatioun, f. variation, l.
   variatio. see vary.
   1. the act of varying; a partial change in the form,
      position, state, or qualities of a thing; modification;
      alteration; mutation; diversity; deviation; as, a
      variation of color in different lights; a variation in
      size; variation of language.
      1913 webster

            the essences of things are conceived not capable of
            any such variation.                   --locke.
      1913 webster

   2. extent to which a thing varies; amount of departure from a
      position or state; amount or rate of change.
      1913 webster

   3. gram. change of termination of words, as in declension,
      conjugation, derivation, etc.
      1913 webster

   4. mus. repetition of a theme or melody with fanciful
      embellishments or modifications, in time, tune, or
      harmony, or sometimes change of key; the presentation of a
      musical thought in new and varied aspects, yet so that the
      essential features of the original shall still preserve
      their identity.
      1913 webster

   5. alg. one of the different arrangements which can be made
      of any number of quantities taking a certain number of
      them together.
      1913 webster

   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.

   calculus of variations. see under calculus.

   variation compass. see under compass.

   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.

   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 also declination of
      the needle.
      1913 webster

   syn: change; vicissitude; variety; deviation.
        1913 webster
see also:
vary annual variation calculus of variations calculus variation compass compass 
variation of the moon variation of the needle declination of the needle 

[2] : The Collaborative International Dictionary of English v.0.48

declination \dec`lina"tion\, n. l. declinatio a bending aside,
   an avoiding: cf. f. d'eclination a decadence. see
   declension.
   1. the act or state of bending downward; inclination; as,
      declination of the head.
      1913 webster

   2. the act or state of falling off or declining from
      excellence or perfection; deterioration; decay; decline.
      "the declination of monarchy." --bacon.
      1913 webster

            summer . . . is not looked on as a time
            of declination or decay.              --waller.
      1913 webster

   3. the act of deviating or turning aside; oblique motion;
      obliquity; withdrawal.
      1913 webster

            the declination of atoms in their descent.
                                                  --bentley.
      1913 webster

            every declination and violation of the rules.
                                                  --south.
      1913 webster

   4. the act or state of declining or refusing; withdrawal;
      refusal; averseness.
      1913 webster

            the queen's declination from marriage. --stow.
      1913 webster

   5. astron. the angular distance of any object from the
      celestial equator, either northward or southward.
      1913 webster

   6. dialing the arc of the horizon, contained between the
      vertical plane and the prime vertical circle, if reckoned
      from the east or west, or between the meridian and the
      plane, reckoned from the north or south.
      1913 webster

   7. gram. the act of inflecting a word; declension. see
      decline, v. t., 4.
      1913 webster

   angle of declination, the angle made by a descending line,
      or plane, with a horizontal plane.

   circle of declination, a circle parallel to the celestial
      equator.

   declination compass physics, a compass arranged for
      finding the declination of the magnetic needle.

   declination of the compass or declination of the needle,
      the horizontal angle which the magnetic needle makes with
      the true north-and-south line.
      1913 webster
see also:
declension decline angle of declination circle of declination declination compass declination of the compass 
declination of the needle 

Needle >> N Words
Needle, definition of term: Needle
needle_pag1.html

Declination >> D Words
Declination, definition of term: Declination
declination_pag1.html

Needle Rush >> N Words
Needle Rush, definition of term: Needle Rush
needle+rush_pag1.html

Needle Zeolite >> N Words
Needle Zeolite, definition of term: Needle Zeolite
needle+zeolite_pag1.html

Needle Gun >> N Words
Needle Gun, definition of term: Needle Gun
needle+gun_pag1.html

Needle Bush >> N Words
Needle Bush, definition of term: Needle Bush
needle+bush_pag1.html

Needle Cast >> N Words
Needle Cast, definition of term: Needle Cast
needle+cast_pag1.html

Knitting Needle >> K Words
Knitting Needle, definition of term: Knitting Needle
knitting+needle_pag1.html

Crochet Needle >> C Words
Crochet Needle, definition of term: Crochet Needle
crochet+needle_pag1.html

Pins And Needle >> P Words
Pins And Needle, definition of term: Pins And Needle
pins+and+needle_pag1.html