Please explain the meaning of transgenic bio-reactor

A transgenic bio-reactor is a genetically engineered organism (usually a plant or animal) that is designed to produce a specific protein or substance that can be used for a particular purpose. The organism is modified by introducing genes from another organism that code for the desired protein or substance. This process is done in order to create a living factory that can produce large quantities of the desired protein or substance. The transgenic bio-reactor is used in biotechnology to produce drugs, vaccines, enzymes, and other products