The lateral malleolus is a term commonly used in anatomy to describe the bony prominence on the outside of the ankle joint. It is an important structure that helps stabilize the ankle joint during weight-bearing activities. Synonyms for the lateral malleolus include fibular malleolus or lateral ankle bone. The fibular malleolus is often used in medical literature and is derived from the name of the bone it is a part of, the fibula. The lateral ankle bone is a more descriptive term as it identifies the location of the structure and its bony composition. Regardless of the synonym used, the lateral malleolus remains a vital part of the ankle joint complex.