Source : Webster's Revised Unabridged Dictionary (1913)

Similitude \Si*mil"i*tude\, n. [F. similitude, L. similitudo,
   from similis similar. See {Similar}.]
   1. The quality or state of being similar or like;
      resemblance; likeness; similarity; as, similitude of
      substance. --Chaucer.

            Let us make now man in our image, man In our
            similitude.                           --Milton.

            If fate some future bard shall join In sad
            similitude of griefs to mine.         --Pope.

   2. The act of likening, or that which likens, one thing to
      another; fanciful or imaginative comparison; a simile.

            Tasso, in his similitudes, never departed from the
            woods; that is, all his comparisons were taken from
            the country.                          --Dryden.

   3. That which is like or similar; a representation,
      semblance, or copy; a facsimile.

            Man should wed his similitude.        --Chaucer.

Source : WordNet®

similitude
     n 1: similarity in appearance or character or nature between
          persons or things; "man created God in his own likeness"
          [syn: {likeness}, {alikeness}] [ant: {unlikeness}, {unlikeness}]
     2: a duplicate copy [syn: {counterpart}, {twin}]