The gracilis muscle is a long, slender muscle located in the inner thigh. In medical terminology, it is also known as the musculus gracilis. The gracilis muscle is primarily responsible for adducting the thigh, or moving it inward towards the body. There are several other terms that can be used to describe the gracilis muscle. These include the thin muscle, the slim muscle, and the slender muscle. Other synonyms for the gracilis muscle include the gracile muscle and the gracilis femoris. Regardless of the terminology used, the gracilis muscle plays an important role in lower body movement and stability.