\Syn"the*sis\, n.; pl. {Syntheses}. [L., a mixture,
properly, a putting together, Gr. ?, fr. ? to place or put
together; sy`n with + ? to place. See {Thesis}.]
1. Composition, or the putting of two or more things
   together, as in compounding medicines.
2. (Chem.) The art or process of making a compound by putting
   the ingredients together, as contrasted with analysis;
   thus, water is made by synthesis from hydrogen and oxygen;
   hence, specifically, the building up of complex compounds
   by special reactions, whereby their component radicals are
   so grouped that the resulting substances are identical in
   every respect with the natural articles when such occur;
   thus, artificial alcohol, urea, indigo blue, alizarin,
   etc., are made by synthesis.
3. (Logic) The combination of separate elements of thought
   into a whole, as of simple into complex conceptions,
   species into genera, individual propositions into systems;
   -- the opposite of {analysis}.
         Analysis and synthesis, though commonly treated as
         two different methods, are, if properly understood,
         only the two necessary parts of the same method.
         Each is the relative and correlative of the other.
                                               --Sir W.
                                               Hamilton.