synthesis
US /ˈsɪn.θə.sɪs/
UK /ˈsɪn.θə.sɪs/

1.
the combination of components or elements to form a connected whole
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The report provides a synthesis of the research findings.
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His new theory is a synthesis of various philosophical ideas.
2.
the production of chemical compounds by reaction from simpler materials
:
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The laboratory is working on the synthesis of new polymers.
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Photosynthesis is the biological synthesis of organic compounds.