Semicircular ducts are a key component of the inner ear that helps regulate balance and orientation. The term "semicircular" refers to the shape of these ducts, which are curved like horseshoes. However, there are several synonyms that could be used to describe them. One common synonym is "semicircular canals," as the fluid-filled ducts are essentially channels that connect to the vestibule of the inner ear. Other potential synonyms might include "curved ducts," "arcuate passageways," or "crescent-shaped conduits." Regardless of the terminology used, the semicircular ducts are an important part of the human anatomy and play a critical role in maintaining equilibrium.