polycondensation

[ pol-ee-kon-den-sey-shuh n ]
/ ˌpɒl iˌkɒn dɛnˈseɪ ʃən /

noun Chemistry.

formation of a polymer by chemical condensation with the elimination of a small molecule, such as water.

Origin of polycondensation

First recorded in 1935–40; poly- + condensation