The DICT Development Group

  Complex \Com"plex\ (k[o^]m"pl[e^]ks), a. [L. complexus, p. p. of
     complecti to entwine around, comprise; com- + plectere to
     twist, akin to plicare to fold. See Plait, n.]
     1. Composed of two or more parts; composite; not simple; as,
        a complex being; a complex idea.
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              Ideas thus made up of several simple ones put
              together, I call complex; such as beauty, gratitude,
              a man, an army, the universe.         --Locke.
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     2. Involving many parts; complicated; intricate.
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              When the actual motions of the heavens are
              calculated in the best possible way, the process is
              difficult and complex.                --Whewell.
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     Complex fraction. See Fraction.
  
     Complex number (Math.), in the theory of numbers, an
        expression of the form a + b[root]-1, when a and b are
        ordinary integers.
  
     Syn: See Intricate.
          [1913 Webster]