Source : Webster's Revised Unabridged Dictionary (1913)

Logistic \Lo*gis"tic\, Logistical \Lo*gis"tic*al\, a. [Gr. ?
   skilled in calculating, ? to calculate, fr. lo`gos word,
   number, reckoning: cf. F. logistique.]
   1. Logical. [Obs.] --Berkeley.

   2. (Math.) Sexagesimal, or made on the scale of 60; as,
      logistic, or sexagesimal, arithmetic.

   {Logistic}, or {Proportional}, {logarithms}, certain
      logarithmic numbers used to shorten the calculation of the
      fourth term of a proportion of which one of the terms is a
      given constant quantity, commonly one hour, while the
      other terms are expressed in minutes and seconds; -- not
      now used.

Proportional \Pro*por"tion*al\, n.
   1. (Math.) Any number or quantity in a proportion; as, a mean
      proportional.

   2. (Chem.) The combining weight or equivalent of an element.
      [Obs.]

Proportional \Pro*por"tion*al\, a. [L. proportionalis: cf. F.
   proportionnel.]
   1. Having a due proportion, or comparative relation; being in
      suitable proportion or degree; as, the parts of an edifice
      are proportional. --Milton.

   2. Relating to, or securing, proportion. --Hutton.

   3. (Math.) Constituting a proportion; having the same, or a
      constant, ratio; as, proportional quantities; momentum is
      proportional to quantity of matter.

   {Proportional logarithms}, logistic logarithms. See under
      {Logistic}.

   {Proportional scale}, a scale on which are marked parts
      proportional to the logarithms of the natural numbers; a
      logarithmic scale.

   {Proportional} {scales, compasses, dividers}, etc.
      (Draughting), instruments used in making copies of
      drawings, or drawings of objects, on an enlarged or
      reduced scale.

Proportional \Pro*por"tion*al\, a. [L. proportionalis: cf. F.
   proportionnel.]
   1. Having a due proportion, or comparative relation; being in
      suitable proportion or degree; as, the parts of an edifice
      are proportional. --Milton.

   2. Relating to, or securing, proportion. --Hutton.

   3. (Math.) Constituting a proportion; having the same, or a
      constant, ratio; as, proportional quantities; momentum is
      proportional to quantity of matter.

   {Proportional logarithms}, logistic logarithms. See under
      {Logistic}.

   {Proportional scale}, a scale on which are marked parts
      proportional to the logarithms of the natural numbers; a
      logarithmic scale.

   {Proportional} {scales, compasses, dividers}, etc.
      (Draughting), instruments used in making copies of
      drawings, or drawings of objects, on an enlarged or
      reduced scale.

Compasses \Com"pass*es\, n., pl.
   An instrument for describing circles, measuring figures,
   etc., consisting of two, or (rarely) more, pointed branches,
   or legs, usually joined at the top by a rivet on which they
   move.

   Note: The compasses for drawing circles have adjustable pen
         points, pencil points, etc.; those used for measuring
         without adjustable points are generally called
         dividers. See {Dividers}.

   {Bow compasses}. See {Bow-compass}.

   {Caliber compasses}, {Caliper compasses}. See {Calipers}.

   {Proportional}, {Triangular}, etc., {compasses}. See under
      {Proportional}, etc.

Source : WordNet®

proportional
     n : one of the quantities in a mathematical proportion

proportional
     adj 1: properly related in size or degree or other measurable
            characteristics; usually followed by `to'; "punishment
            oughtt to be proportional to the crime"; "earnings
            relative to production" [syn: {relative}]
     2: increasing as the amount taxed increases [syn: {graduated}]