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

harmonic \harmon"ic\ haumrmo^n"i^k, harmonical
\harmon"ical\ -i^kal, a. l. harmonicus, gr. "armoniko`s;
   cf. f. harmonique. see harmony.
   1. concordant; musical; consonant; as, harmonic sounds.
      1913 webster

            harmonic twang of leather, horn, and brass. --pope.
      1913 webster

   2. mus. relating to harmony, -- as melodic relates to
      melody; harmonious; esp., relating to the accessory sounds
      or overtones which accompany the predominant and apparent
      single tone of any string or sonorous body.
      1913 webster

   3. math. having relations or properties bearing some
      resemblance to those of musical consonances; -- said of
      certain numbers, ratios, proportions, points, lines,
      motions, and the like.
      1913 webster

   harmonic interval mus., the distance between two notes of
      a chord, or two consonant notes.

   harmonical mean arith.  alg., certain relations of
      numbers and quantities, which bear an analogy to musical
      consonances.

   harmonic motion, the motion of the point a, of the foot of
      the perpendicular pa, when p moves uniformly in the
      circumference of a circle, and pa is drawn perpendicularly
      upon a fixed diameter of the circle. this is simple
      harmonic motion. the combinations, in any way, of two or
      more simple harmonic motions, make other kinds of harmonic
      motion. the motion of the pendulum bob of a clock is
      approximately simple harmonic motion.

   harmonic proportion. see under proportion.

   harmonic series or harmonic progression. see under
      progression.

   spherical harmonic analysis, a mathematical method,
      sometimes referred to as that of laplace's coefficients,
      which has for its object the expression of an arbitrary,
      periodic function of two independent variables, in the
      proper form for a large class of physical problems,
      involving arbitrary data, over a spherical surface, and
      the deduction of solutions for every point of space. the
      functions employed in this method are called spherical
      harmonic functions. --thomson  tait.

   harmonic suture anat., an articulation by simple
      apposition of comparatively smooth surfaces or edges, as
      between the two superior maxillary bones in man; -- called
      also harmonia, and harmony.

   harmonic triad mus., the chord of a note with its third
      and fifth; the common chord.
      1913 webster
see also:
harmony harmonic interval harmonical mean harmonic motion harmonic proportion proportion 
harmonic series harmonic progression progression spherical harmonic analysis laplace's coefficients 
harmonic suture harmonia harmony harmonic triad 

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

motion \mo"tion\, n. f., fr. l. motio, fr. movere, motum, to
   move. see move.
   1. the act, process, or state of changing place or position;
      movement; the passing of a body from one place or position
      to another, whether voluntary or involuntary; -- opposed
      to rest.
      1913 webster

            speaking or mute, all comeliness and grace
            attends thee, and each word, each motion, forms.
                                                  --milton.
      1913 webster

   2. power of, or capacity for, motion.
      1913 webster

            devoid of sense and motion.           --milton.
      1913 webster

   3. direction of movement; course; tendency; as, the motion of
      the planets is from west to east.
      1913 webster

            in our proper motion we ascend.       --milton.
      1913 webster

   4. change in the relative position of the parts of anything;
      action of a machine with respect to the relative movement
      of its parts.
      1913 webster

            this is the great wheel to which the clock owes its
            motion.                               --dr. h. more.
      1913 webster

   5. movement of the mind, desires, or passions; mental act, or
      impulse to any action; internal activity.
      1913 webster

            let a good man obey every good motion rising in his
            heart, knowing that every such motion proceeds from
            god.                                  --south.
      1913 webster

   6. a proposal or suggestion looking to action or progress;
      esp., a formal proposal made in a deliberative assembly;
      as, a motion to adjourn.
      1913 webster

            yes, i agree, and thank you for your motion. --shak.
      1913 webster

   7. law an application made to a court or judge orally in
      open court. its object is to obtain an order or rule
      directing some act to be done in favor of the applicant.
      --mozley  w.
      1913 webster

   8. mus. change of pitch in successive sounds, whether in
      the same part or in groups of parts.
      1913 webster

            the independent motions of different parts sounding
            together constitute counterpoint.     --grove.
      1913 webster

   note: conjunct motion is that by single degrees of the scale.
         contrary motion is that when parts move in opposite
         directions. disjunct motion is motion by skips. oblique
         motion is that when one part is stationary while
         another moves. similar or direct motion is that when
         parts move in the same direction.
         1913 webster

   9. a puppet show or puppet. obs.
      1913 webster

            what motion's this? the model of nineveh? --beau. 
                                                  fl.
      1913 webster

   note: motion, in mechanics, may be simple or compound.

   simple motions are: a straight translation, which, if
      of indefinite duration, must be reciprocating. b
      simple rotation, which may be either continuous or
      reciprocating, and when reciprocating is called
      oscillating. c helical, which, if of indefinite
      duration, must be reciprocating.

   compound motion consists of combinations of any of the
      simple motions.
      1913 webster

   center of motion, harmonic motion, etc. see under
      center, harmonic, etc.

   motion block steam engine, a crosshead.

   perpetual motion mech., an incessant motion conceived to
      be attainable by a machine supplying its own motive forces
      independently of any action from without. according to the
      law of conservation of energy, such perpetual motion is
      impossible, and no device has yet been built that is
      capable of perpetual motion.
      1913 webster +pjc

   syn: see movement.
        1913 webster
see also:
move rest simple motions a b c 
compound motion center of motion harmonic motion center harmonic 
motion block perpetual motion movement 

[3] : WordNet (r) 2.0

harmonic motion
     n : a periodic motion in which the displacement is either
         symmetrical about a point or is the sum of such motions

Motion >> M Words
Motion, definition of term: Motion
motion_pag1.html

Harmonic >> H Words
Harmonic, definition of term: Harmonic
harmonic_pag1.html

Motion Picture >> M Words
Motion Picture, definition of term: Motion Picture
motion+picture_pag1.html

Motion Sickness >> M Words
Motion Sickness, definition of term: Motion Sickness
motion+sickness_pag1.html

Harmonic Progre >> H Words
Harmonic Progre, definition of term: Harmonic Progre
harmonic+progre_pag1.html

Harmonic Mean >> H Words
Harmonic Mean, definition of term: Harmonic Mean
harmonic+mean_pag1.html

Brownian Motion >> B Words
Brownian Motion, definition of term: Brownian Motion
brownian+motion_pag1.html

Law Of Motion >> L Words
Law Of Motion, definition of term: Law Of Motion
law+of+motion_pag1.html