The term "Ranalian Complex" is a geologic concept that describes a structural feature in the Earth's crust. However, there are a number of synonyms for this term that are used in different scientific contexts. Some of these include "Ranalean Complex," "Ranalean zone," and "Ranalean metamorphic belt." These synonyms describe the same geologic feature, which is characterized by a series of metamorphic rocks that have undergone significant deformation and faulting. The term "Ranalian Complex" is often used in reference to the rocks found in the Himalayan Mountains, but the concept applies to other mountain ranges and geologic formations around the world.