/
sɪnˈθɛtɪk/
adj.
   - made by chemical synthesis, especially to imitate a natural product. 
▸not genuine; unnatural.
 - Logic  having truth or falsity determinable by recourse to experience. Compare with analytic.
 - Linguistics  (of a language) tending to use inflections rather than word order to express grammatical structure. Contrasted with analytic.
 
n.
 a synthetic substance, especially a textile fibre.
Derivative
- synthetical adj.
  - synthetically adv.
 
Etymology
C17: from Fr. synthétique or mod. L. syntheticus, from Gk sunthetikos, based on suntithenai ‘place together’.