noun pl. syntheses -·ses′ (-sēz′)

1. the putting together of parts or elements so as to form a whole
2. a whole made up of parts or elements put together
3. Chem. the formation of a complex compound by the combining of two or more simpler compounds, elements, or radicals
4. Philos. in Hegelian philosophy, the unified whole in which opposites (thesis and antithesis) are reconciled

Etymology: Gr < syn-, together + tithenai, to place, do