The term "Terminal Complement Complex" refers to a group of proteins that are part of the body's immune system, specifically the complement system. This complex plays a crucial role in the defense against infections and foreign invaders. Synonyms commonly used to describe the Terminal Complement Complex include the Membrane Attack Complex (MAC) and the C5b-9 complex. The MAC is formed when certain proteins from the complement system assemble on the surface of pathogens or abnormal cells, leading to their destruction. Understanding these synonyms is vital for scientific research and medical professionals, as they all refer to the same important immune response mechanism.