Source : Webster's Revised Unabridged Dictionary (1913)

Constituent \Con*stit"u*ent\, a. [L. constituens, -entis, p. pr.
   See {Constitute}.]
   1. Serving to form, compose, or make up; elemental;
      component.

            Body, soul, and reason are the three parts
            necessarily constituent of a man.     --Dryden.

   2. Having the power of electing or appointing.

            A question of right arises between the constituent
            and representative body.              --Junius.

Constituent \Con*stit"u*ent\, n.
   1. The person or thing which constitutes, determines, or
      constructs.

            Their first composure and origination require a
            higher and nobler constituent than chance. --Sir M.
                                                  Hale

   2. That which constitutes or composes, as a part, or an
      essential part; a component; an element.

            We know how to bring these constituents together,
            and to cause them to form water.      --Tyndall.

   3. One for whom another acts; especially, one who is
      represented by another in a legislative assembly; --
      correlative to representative.

            The electors in the district of a representative in
            Congress, or in the legislature of a State, are
            termed his constituents.              --Abbot.

            To appeal from the representatives to the
            constituents.                         --Macaulay.

   4. (Law) A person who appoints another to act for him as
      attorney in fact. --Burrill.

Source : WordNet®

constituent
     adj : constitutional in the structure of something (especially
           your physical makeup) [syn: {constituent(a)}, {constitutional},
            {constitutive(a)}, {organic}]
     n 1: an artifact that is one of the individual parts of which a
          composite entity is made up; especially a part that can
          be separated from or attached to a system; "spare
          components for cars"; "a component or constituent
          element of a system" [syn: {component}, {element}]
     2: a member of a constituency; a citizen who is represented in
        a government by officials for whom he or she votes; "needs
        continued support by constituents to be re-elected"
     3: (grammar) a word or phrase or clause forming part of a
        larger grammatical construction [syn: {grammatical
        constituent}]
     4: an abstract part of something; "jealousy was a component of
        his character"; "two constituents of a musical composition
        are melody and harmony"; "the grammatical elements of a
        sentence"; "a key factor in her success"; "humor: an
        effective ingredient of a speech" [syn: {component}, {element},
         {factor}, {ingredient}]