the.com/plastification

means The process of preserving a body (or tissue) by replacing its fluids with polymers, so it holds its shape and texture permanently instead of rotting.

from A 20th-century coinage built from 'plastic' (from Greek 'plastikos', meaning moldable or fit for shaping) plus the verb-forming '-ify' and noun suffix '-ation'. The technique itself — polymer preservation of tissue — was developed and named by a German anatomist in the late 1970s, who patented the process under a related term; 'plastification' followed the pattern of that invention, describing literally what happens: flesh made plastic, shaped and fixed forever in the pose of a lesson.