[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

progression \progres"sion\, n. l. progressio: cf. f.
   progression.
   1913 webster
   1. the act of moving forward; a proceeding in a course;
      motion onward.
      1913 webster

   2. course; passage; lapse or process of time.
      1913 webster

            i hope, in a short progression, you will be wholly
            immerged in the delices and joys of religion.
                                                  --evelyn.
      1913 webster

   3. math. regular or proportional advance in increase or
      decrease of numbers; continued proportion, arithmetical,
      geometrical, or harmonic.
      1913 webster

   4. mus. a regular succession of tones or chords; the
      movement of the parts in harmony; the order of the
      modulations in a piece from key to key.
      1913 webster

   arithmetical progression, a progression in which the terms
      increase or decrease by equal differences, as the numbers
      lbrace22, 4, 6, 8, 1010, 8, 6, 4, 2rbrace2 by the
      difference 2.
      1913 webster

   geometrical progression, a progression in which the terms
      increase or decrease by equal ratios, as the numbers
      lbrace22, 4, 8, 16, 32, 6464, 32, 16, 8, 4, 2rbrace2
      by a continual multiplication or division by 2.
      1913 webster

   harmonic progression, a progression in which the terms are
      the reciprocals of quantities in arithmetical progression,
      as 1/2, 1/4, 1/6, 1/8, 1/10.
      1913 webster
see also:
arithmetical progression geometrical progression harmonic progression 

[3] : WordNet (r) 2.0

harmonic progression
     n : mathematics a progression of terms whose reciprocals form
         an arithmetic progression

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

Progression >> P Words
Progression, definition of term: Progression
progression_pag1.html

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

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