Necrolyzation

Necrolyzation is an act of reanimating corpses. The verb form of this word is necrolyze.

Process
One of the simplest form of necrolyzation is through ingesting necrolyzation serum before death. The result is a necrolyzer that appears in the form of a green-skinned giant.

Another necrolyzation process is through administering necrolyzation serum intravenously. It is a more complex process, but the produced necrolyzer looks more like its base body gigantified.

Another process involves keeping a corpse in a capsule filled with necrolyzation serum while also administering the serum intravenously. This process presumably produces orgmen.

Effects
Necrolyzation grants immense strength and endurance to the subjects in exchange for their humanity and sanity. A subject is often turned into a vicious monster with this process. However, there are some cases in which the subjects manage to retain their humanity and be more stable.

Upon necrolyzation, the subject will be relying on renewal therapy for a lifetime. Should the subject fail to receive the therapy, the body will grow weak as it slowly undergoes the stages of death.

Trivia

 * In the anime series, depending on the translation, necrolyze is sometimes spelled as 'necrolize', 'necrolise', or 'necro-rise'.