syn·the·sis 
(sĭnthĭ-sĭs)
(sĭnthĭ-sĭs)n. pl. syn·the·ses (-sēz′)
1.
a. The combining of separate elements or substances to form a coherent whole.
b. The complex whole so formed.
2. Chemistry Formation of a compound from simpler compounds or elements.
3. Philosophy
a. Reasoning from the general to the particular; logical deduction.
b. The combination of thesis and antithesis in the Hegelian dialectical process whereby a new and higher level of truth is produced.
[Latin, collection, from Greek sunthesis, from suntithenai, to put together : sun-, syn- + tithenai, to put; see dhē- in the Appendix of Indo-European roots.]
synthe·sist n.